The Caves of Drach, located on the eastern coast of Mallorca, are a fascinating underground network of caves. These caves are famous for their stunning stalactite and stalagmite formations, as well as an underground lake called Lake Martel. Visitors can take guided tours through the caves, marveling at the natural wonders and learning about their geological history. The highlight of the tour is a classical music concert performed on boats floating on the lake, creating a magical and unforgettable experience.