Sotano de Las Golondrinas – CAVE MEXICO
Sótano de las Golondrinas (Swallow Cave) is an open pit in Aquismón, Mexico. Under the cave is 333 meters deep on the lowest side of the opening, or a maximum of 370, which is the largest known cave in the world window. Cave Swallow is the second deepest cave in Mexico, and it is believed the 11th deepest in the world. Known as the Swallow Basement in Spanish, in a population of thousands of birds, of which the largest green parrots and swifts with white collar that are very similar to swallows (although the two are not related) and which is likely to cave got its name.