The Marble Caverns of Carrera Lake have amazingly smooth and cool caves of marble. The water is clear enough to see deep down to the bottom. The Marble Caves, Marble Chapel, and Marble Cathedral are an unusual geological formation in the General Carrera Lake or Lake Buenos Aires (as it is popularly called) located in Patagonia. Hop on a ferry and take a trip to these unusual marble formations. Don’t forget to get your camera with you.