14. The Marble Cathedral
Marble cathedral, also known as Cuevas de Marmol, is located at Chile’s General Carrera Lake of Chile-Argentina border. It was carved 6000 years ago due to crash of waves into calcium carbonate. The crystal clear water and incredibly patterned wall of marble catch the eye of the viewers. Moreover, access of the cave by boat makes it more astonishing. Also the variation of water color with water level, weather and time of year makes the cave one of the most amazing caves in the world.
Image Credit: nationalgeographic