Rivière souterraine de Labouïche

This underground river extends over 1.5 kilometers beneath the surface, featuring limestone galleries, stalactites, stalagmites, and crystal-clear waters that visitors can explore during guided boat tours lasting approximately 75 minutes.

The underground river was first seriously explored in 1908 by Doctor Dunac and his collaborators, who ventured beneath the Aiguo-Perdent vault to identify this mysterious network of subterranean waters that had formed over millions of years through limestone erosion.

Professional guides enhance the experience with educational commentary, humor, and local anecdotes while sharing geological knowledge and exploration stories, making the site accessible to families with children as young as 3 years old through engaging storytelling.

The attraction operates from March 30 to November 11 with extended hours until 7 PM during high season, offers adult tickets at €14.80 with group discounts available, and provides restaurant facilities, picnic areas, and souvenir shops for visitor convenience.

This site holds the distinction of being Europe's longest navigable underground river, offering boat excursions through illuminated caverns where visitors can observe rare geological formations and experience a constant temperature of 12 degrees Celsius year-round.