The Cuicocha sanctuary in Ecuador was the site of religious worship for the local inhabitants. It is located inside the 3 km wide, 180 m deep crater of the Cuicocha volcano, which was formed thousands of years ago after an eruption. The crater lake receives water from melting snow and ice in the volcano. It has abundant flora and fauna, including over 400 plant species and animals like guinea pigs, foxes, and condors. Tourists can now kayak, hike trails, and learn about the natural environment at this scenic former volcanic crater.