There's a 4h bus (company: Vallecito) leaving three times a day from San Juan (43 pesos).
The Ischigualasto Provincial Park (Moon Valley) and the Talampaya National Park (canyon) are nearby. Two tourist companies can take you there (they will wait for you at the bus station); note that the entrance fee to the parks is not included in their prices. The HI hostel also takes your to the parks.
- Hostel Valle de la Luna,  [dead link], offer tours to the parks, free wifi, 35 pesos (30 for HI members)
- Eco Hostel