The eastern part of San Juan Province is very different from the Andes in the west. Here you'll find the spectacular Valle Fértil hills, dinosaur fossils, desert landscapes, reservoirs, historic villages, and important cultural and religious sites. AArgentina Travel+1

1. Ischigualasto Provincial Park — Valle de la Luna ⭐⭐⭐⭐⭐

Parque Provincial Ischigualasto

Ischigualasto Provincial Park, better known as Valle de la Luna (Valley of the Moon), is by far the most spectacular destination in eastern San Juan.

Its strange rock formations and barren landscapes were shaped by wind, water, and erosion over millions of years. It is also one of the world's most important places for understanding the Triassic Period and the early evolution of dinosaurs. The park is part of the UNESCO World Heritage site shared with neighboring Talampaya. AArgentina Travel+1

Don't miss:

• El Hongo (The Mushroom)
• La Esfinge (The Sphinx)
• El Gusano (The Worm)
• Cancha de Bochas
• The paleontological museum
• The scenic park circuit

Best for: dinosaurs, geology, photography, and unique landscapes.

2. San Agustín del Valle Fértil ⭐⭐⭐⭐⭐

San Agustín del Valle Fértil is the main town and a great base for exploring eastern San Juan.

Unlike the dry landscapes around much of the province, Valle Fértil is a relatively green mountain oasis, surrounded by the Sierras de Valle Fértil. The town offers accommodation, restaurants, local culture, horseback riding, hiking, and access to nearby natural attractions. GGobierno de San Juan+1

Things to do:

• Walk around the town
• Visit local museums
• Explore the surrounding hills
• Go horseback riding
• Visit the local reservoir
• Use the Valle an excellent choice if you enjoy wildlife park protects forests, cactus landscapes, streams, and native vegetation. It is particularly notable for birdwatching: more birdwatching, hiking, horseback riding, and nature photography Astica & the Sierras de Riveros a small village in Valle Fértil surrounded by beautiful hills and rural is a good place to experience a quieter, more traditional side of San Juan. The area regional villages,ique San Agustín ⭐⭐⭐⭐ town as a base for Ischigualasto

Best for: relaxing, rural tourism, hiking, and exploring the region.

3. Valle Fértil Natural Park ⭐⭐⭐⭐⭐

The Valle Fértil Natural Park is an excellent choice if you enjoy wildlife and nature.

The park protects forests, cactus landscapes, streams, and native vegetation. It is particularly notable for birdwatching: more than 200 bird species can be observed in the area, representing around 23% of Argentina's bird species. AArgentina Travel+1

Best for: birdwatching, hiking, horseback riding, and nature photography.

4. Astica & the Sierras de Riveros ⭐⭐⭐⭐½

Astica is a small village in Valle Fértil surrounded by beautiful hills and rural landscapes.

It is a good place to experience a quieter, more traditional side of San Juan. The area includes the San Pedro temple, local artisans, regional sweets, and access to the Sierras de Riveros. GGobierno de San Juan

Nearby natural attractions also include streams and waterfalls, making this an interesting stop on a road trip through Valle Fértil.

Best for: villages, local culture, waterfalls, and scenic drives.

5. Dique San Agustín ⭐⭐⭐⭐

The San Agustín Reservoir is located right by San Agustín del Valle Fértil.

It provides a pleasant contrast to the surrounding dry landscape, with water, hills, and vegetation. It is particularly attractive around sunset, when the surrounding mountains take on warm colors.

Best for: photography, relaxing, sunsets, and a short stop while visiting San Agustín.

6. Santuario de la Difunta Correa ⭐⭐⭐⭐½

Difunta Correa

Located in Vallecito, about 64 km from San Juan city, the Difunta Correa Sanctuary is one of Argentina's most important destinations for popular religious devotion.

The sanctuary is associated with the legend of Deolinda Correa, and thousands of visitors come to leave offerings and ask for protection or give thanks. The site also has the Museo de la Fe. AArgentina.gob.ar

Even for travelers who aren't religious, it is an interesting cultural experience and an important part of San Juan's identity.

Best for: culture, history, folklore, and understanding local traditions.

7. Usno & Museo Piedras del Mundo ⭐⭐⭐⭐

Usno, near San Agustín, is home to the Museo Piedras del Mundo, which focuses on minerals, rocks, fossils, flora, fauna, and the cultural heritage of the region.

It is a particularly good stop if you're interested in the geological story of Valle Fértil and Ischigualasto.

Best for: geology, fossils, minerals, and families.

8. Las Tumanas Valley ⭐⭐⭐⭐

The Las Tumanas River creates one of the greener landscapes in Valle Fértil. The valley is a good option for travelers looking for small streams, vegetation, mountains, and a more peaceful environment away from the main tourist attractions.

Best for: nature, scenery, and getting off the beaten path.

⭐ My Top 5

If you only have a few days, I'd prioritize:

1. Ischigualasto / Valley of the Moon — the absolute must-see.
2. San Agustín del Valle Fértil — the best base for the region.
3. Valle Fértil Natural Park — wildlife and beautiful landscapes.
4. Astica & the Sierras de Riveros — rural scenery and waterfalls.
5. Difunta Correa Sanctuary — culture, history, and Argentine folklore.

Suggested 3-day itinerary

Day 1: San Juan → Difunta Correa → San Agustín del Valle Fértil

Day 2: San Agustín → Ischigualasto / Valle de la Luna → return to San Agustín

Day 3: Valle Fértil Natural Park → Astica → Las Tumanas → San Agustín

This route combines the best scenery, geology, wildlife, culture, and history of eastern San Juan without trying to cover too much territory. The official tourism information also recommends Valle Fértil as a destination in its own right rather than simply a place to sleep before visiting Ischigualasto.

Hello fellow travelers! I hope you are very well, happy Tuesday everyone ❤️. Today I'm very excited because I'm finally going to start sharing postcards from my last trip last month . Together with my friend, my two aunts and my cousin we made a 5-day trip to the south of the province of Buenos Aires where we had several interesting stops. Weekly I will share with you the destinations we visit, I hope you like them ❤️.

Today I want to tell you about the first stop we made: the San Miguel del Monte lagoon. Ok, although it may not seem like it, this on my cover is a loophole, please believe me .

We started this journey on August 14 of this year, exactly one month ago. That week had a few days of exceptionally dense fog: in sections it was almost impossible to drive and everywhere they warned that great care should be taken especially on the roads. Nice moment to start a distant journey, but anyway we went, no simple fog was going to stop us .

Ok, at the time we were not as brave as now that I relate it. We left at 7AM and it was almost 11AM and the fog still lasted. It seemed like he was never going to leave, even though we believed that by noon the road would be clear. After all those hours of travel at minimum speed, we decided to make the first stop to stretch our legs a bit and rest our eyes.

Source: screenshoot from Google Maps.

It was funny because my cousin who was driving said "ok, we got to the Monte lagoon". What? I thought. At first I thought it was a joke since you couldn't see anything, but when we checked the map we were really facing a large lagoon .

As scary as the photo looks, it was in reality. Literally nothing could be seen, everything looked like a great gray wall and a precipice behind the balcony. You had to get too close if you wanted to see the water, it was all very strange but at the same time it was a good experience to have that landscape .

If you made an effort you could see the ducks in the water. It was very crazy since it seemed like they were floating on nothing. All this reminded me of my own dreams, since landscapes are always like that while I sleep, in a lot of fog and with blurred images .

Even the photos we took were hilarious, as it looked like we were posing in front of a big wall with nothing. I think everyone recognizes that we were in the lagoon just because of the characteristic balconies .

My aunt believed that when we got to this place and being the first stop we made we would be able to have something for breakfast watching the water. Well, surprise, it wasn't. Everything was closed on the side that we went and we only had to settle for drinking almost cold "mates" and going to the bathroom in terrible conditions .

We also have another proof that we were there: the photo on the sign with Monte's lettering. I would like to return to this place to take a better photo, but for the moment I am satisfied with this one. At least the letters were visible .

And if you want to see the lagoon (as I do), here I share some postcards from the web, so that if you still do not believe me, you can do it now .

Source / Fuente

Source / Fuente

I think this place must be really beautiful when it is clear. Judging by the lifeguard signs we saw, there are people who go swimming, which I find incredible since the water level seemed quite high. I hope that one day I can come back and stay there for a few days to enjoy the scenery and that the fog is not a problem, please !

source

Western San Juan is one of Argentina’s most spectacular regions, with the Andes, high-altitude deserts, clear skies, mountain villages, and excellent opportunities for hiking, adventure, and stargazing. The Calingasta and Iglesia valleys are especially worth exploring. Ssanjuan.tur.ar+1

1. Barreal & the Calingasta Valley ⭐⭐⭐⭐⭐

Barreal is probably the best base for exploring western San Juan. It sits in the Calingasta Valley, surrounded by the Andes and with spectacular views of Cerro Mercedario, one of the highest mountains in the Americas at 6,770 m. AArgentina Travel+1

Things to do:

• Enjoy views of the Andes and Cerro Mercedario.
• Go horseback riding or trekking.
• Try rafting on the Los Patos River.
• Explore the surrounding mountain roads.
• Visit local wineries and traditional restaurants.
• Stay overnight and enjoy the exceptionally clear night sky.

Best for: scenery, adventure, photography, and relaxing in a mountain village.

2. Pampa del Leoncito / Barreal Blanco ⭐⭐⭐⭐⭐

This enormous white, dry plain is one of the most unusual landscapes in San Juan. It is about 12 km long and 5 km wide and is famous for land sailing (carrovelismo), where wheeled vehicles are propelled by the strong winds. Ssanjuan.tur.ar

The combination of the white plain, desert vegetation and snow-capped Andes makes it particularly spectacular for photography.

Best for: photography, adventure, landscapes, and sunset.

3. El Leoncito National Park ⭐⭐⭐⭐⭐

Parque Nacional El Leoncito protects almost 90,000 hectares of Andean and desert ecosystems. It is home to native wildlife such as guanacos and the cordilleran rhea, as well as spectacular mountain scenery. Ssanjuan.tur.ar

The park is particularly famous for its extremely clear skies and astronomical facilities.

Don't miss:

Complejo Astronómico El Leoncito (CASLEO) — one of the major astronomical attractions in the region. The park also contains the U. CESCO observatory. Ssanjuan.tur.ar

Best for: stargazing, hiking, wildlife, astronomy, and pristine landscapes.

4. Cerro Alcáz is a relatively short hiking routear ⭐⭐⭐⭐⭐

Located near Barreal, Cerro Alcázar looks like a natural stone castle. Millions of years of erosion have sculpted its colorful sedimentary rocks into dramatic towers and ridges. It is protected as a natural monument.

There is a relatively short hiking route with excellent panoramic views.

Best for: hiking, geology, photography, and unusual Rodeo & Cuesta del Viento ⭐⭐⭐⭐ the landscapes.

5. Rodeo & Cuesta del Viento ⭐⭐⭐⭐½

Further north, Rodeo is the gateway to the spectacular Cuesta del Viento Reservoir. The area is particularly famous for strong winds and water sports, especially kitesurfing and windsurfing.

The surrounding desert mountains create an impressive contrast Valley ⭐⭐⭐ destination in western San Juan, combining mountain landscapes, small villages, historic churches and outdoor activities. The region is particularly attractive if you want to travel beyond the more famous Barreal area. to explore by at small villages and viewpoints trips, culture, landscapes, and getting off Cerro Mercedario & need to climb it to appreciate it—the mountain be admired from numerous viewpoints around Barreal and the valley mountain sceneryBarreal → Pampa del Leoncito → El Leoncito National Park → astronomical observatoryBarreal → views of Cerro Mercedario → Río Los Patos → horseback riding orDrive north toward a be my top four. They give you the best combination tell also make with the blue water.

Best for: water sports, dramatic scenery, and an active trip.

6. Iglesia Valley ⭐⭐⭐⭐

The Iglesia Valley is another excellent destination in western San Juan, combining mountain landscapes, small villages, historic churches and outdoor activities. The region is particularly attractive if you want to travel beyond the more famous Barreal area. Ssanjuan.tur.ar

It's a good area to explore by car, stopping at small villages and viewpoints along the way.

Best for: road trips, culture, landscapes, and getting off the beaten path.

7. Cerro Mercedario & the High Andes ⭐⭐⭐⭐⭐

At 6,770 m (22,211 ft), Cerro Mercedario dominates the skyline around Barreal and the Calingasta Valley. It is an important destination for mountaineers and high-altitude trekkers. AArgentina Travel

You don't need to climb it to appreciate it—the mountain can be admired from numerous viewpoints around Barreal and the valley.

Best for: mountain scenery, trekking, mountaineering, and photography.

️ My recommended itinerary

If you have 3–4 days, I would concentrate on the Calingasta/Barreal area:

Day 1:
San Juan → Calingasta → Barreal → Cerro Alcázar

Day 2:
Barreal → Pampa del Leoncito → El Leoncito National Park → astronomical observatory

Day 3:
Barreal → views of Cerro Mercedario → Río Los Patos → horseback riding or trekking

Day 4:
Drive north toward Rodeo and Cuesta del Viento if you have time.

For a first visit, Barreal + Pampa del Leoncito + El Leoncito National Park + Cerro Alcázar would be my top four. They give you the best combination of Andes scenery, desert landscapes, adventure and some of the clearest skies in Argentina. AArgentina Travel+1