he Vallorbe Caves, which are the biggest in the Jura, figure among the most interesting caves in Europe. They were discovered in 1961 and have been open to the public since 1974. High-ceilinged rooms alternate with galleries over a stretch of 3 km and in a constant temperature of 11°. Hollowed out by the river Orbe for centuries, the caves present a rich assortment of limestone concretions: stalactites, fistulas, limestone columns, and concretions in the shapes of bisons or fairy hair. The visit leads to the streams of the river Orbe flowing underground with deafening noise.

Recent installations improve the visiting conditions even more: modulated lighting focuses on the unusual features one by one; duckboard passages allow for a full view of the cave reliefs.

The visit can be extended with the discovery of a magnificent collection of minerals, the Fairy Treasure Trove, an exceptional moment in the caves.

The caves are situated 1 km from Vallorbe in the Yverdon-les-Bains region.