Caves of Hotton, Limestone cave system in Hotton, Belgium.

Caves of Hotton is a limestone cave network with multiple galleries that descend to depths of 65 meters below ground. The system features distinctive mineral formations and an underground stream flowing through its lowest passages.

The cave system was discovered in 1958 by quarry workers during stone extraction operations and subsequently developed as a tourist site. This accidental find led to its transformation into an accessible attraction for visitors.

The caves are also called the Grottes des 1001 Nuits, a name used by the company that became their tenant in 1964 and sole owner in 1994. Guided tours pass through named chambers such as the Salle Persévérance, Salle Rouget and Salle de Minuit before reaching the Grands Gours and the Balcon overlooking the Spéléo Club de Belgique gallery.

The guided tour lasts about an hour and descends 65 metres underground, with 30 metres of the return climbed on foot and 35 metres by lift; 580 steps line the route. The cave holds a steady 12 degrees Celsius, so bring a warm layer. The entrance is at Chemin du Spéléo Club 1 in Hotton.

The Salle du Spéléo Club de Belgique, reached via the Balcon, measures 200 m long, 35 m high and 10 m wide, making it the largest gallery in Belgium. Visitors descend several flights of steps to its floor before continuing through the Galerie de l'Excentrique toward the lift.