Published
American cavers were first to descend the 1,200-foot deep Sotano De Las Golondrinas, better known as the Cave of Swallows, in 1966. Its one of the worlds largest cave shafts in the world and one of Mexicos 13 natural wonders.
American cavers were first to descend the 1,200-foot deep Sotano De Las Golondrinas, better known as the Cave of Swallows, in 1966. Its one of the worlds largest cave shafts in the world and one of Mexicos 13 natural wonders.