1. Quebrada de las Conchas, also known as Shells' Ravine, is a stunning natural attraction located in the province of Salta, Argentina. This geological formation is characterized by its unique rock formations and colorful landscapes, shaped over millions of years by wind and water erosion.

2. The ravine is open to the public every day from morning to evening, but it is recommended to visit during daylight hours for the best experience. For more information, you can contact the local tourism office in Salta.

3. There is no entrance fee to visit Shells' Ravine, as it is a natural attraction that can be accessed by driving along Route 68, which connects Salta with Cafayate. Tourists can either rent a car or join a guided tour to explore the ravine and its highlights such as Garganta del Diablo (Devil's Throat), Anfiteatro (Amphitheater), and Tres Cruces (Three Crosses).