Professional fishermen know General Carrera Lake on the Chile-Argentina border like the back of their hand. They gather in this place as if for a great holiday. Giant salmon can be caught there during the fishing season. However, not only fish lovers rush to these places, but also millions of tourists from all over the world. They come to see one of the most ancient and rare natural monuments - the Marble Caves, or as they are also called the Marble Cathedral.

The entrance to the marble-covered underground caves is in the center of one of the deepest lakes in the world. The labyrinth of caves is located under the entire peninsula and belongs to the territory of Puerto Montt.

In Chile, this lake was named after the founder of the republic, José Miguel de la Carrera y Verdugo. And in Argentina, it was called the "Lake of the Storm" for its obstinate waters. Its constant waves formed caves and grottos that were previously hidden from view in the depths of the glacial reservoir. Soon the glacier finally melted. So the waters of the beautiful lake exposed the Marble Cathedral by the most brilliant architect and sculptor of the planet - nature.

According to the research by speleologists, the age of the fairy-tale dungeon is more than 6 thousand years, and its numerous tunnels and caves are just the "tip of the iceberg". It remains a mystery where the whole labyrinth can lead, and who lives in its dark depths. According to scientists' preliminary estimates, the total mass of marble in its caves is about 5 million tons. Moreover, the caves are the largest marble deposit in the world. None of the existing cathedrals can afford such luxury.

The most famous grottoes today are the Marble Cathedral, Marble Chapel, and Marble Cave. They differ in their bizarre shapes and vibrant colors that change depending on the weather. And a special performance of the natural theater of optical illusions can be seen on sunny days.