The Marble Caves, also known as the "Cuevas de Mármol" in Spanish, are a series of striking, naturally-formed caves located on the banks of General Carrera Lake in Patagonia, Chile. The caves are made up of striking, swirling patterns of blue and turquoise waters, white and black marble, and bold rock formations. The natural beauty of the caves draws thousands of visitors from all over the world every year.

The Marble Caves are formed as a result of 6,000 years of wave action and weathering on the marble cliffs surrounding the lake. The swirling patterns and shapes of the caves are created by the interplay of light and water, reflecting off the walls and creating an ever-changing and mesmerizing display of color and texture.

Visitors can take boat tours of the caves, which provide an up-close view of the intricate and beautiful marble formations. The caves are accessible only by boat, and the boat tours typically last around 1 hour. The experience of exploring the Marble Caves is a unique and unforgettable one, offering visitors the chance to admire the beauty of nature in a stunning, remote and peaceful location.