Marble Caves (Patagonia, South America)
Over 6,200 years, the huge marble deposits on the edge of the General Carrerra Lake have been worn away by the water, creating caves, tunnels, and huge columns of pure marble. Marble at the surface of the water dissolved the fastest as the water penetrated small cracks, widening them into fractures which were gradually worn away. The result is a marble maze just above the water
level, and some islands including the famous 'marble cathedral' and the 'marble chapel'.