Discovered in 1828, the Remouchamps caves were opened to the public in 1912. A rowing boat allows you to glide silently through subterranean galleries carved by the Rubicon, a tributary of the Amblève, while gazing at the colourful and enchanting sights: strangely shaped arches made up of glittering stalactites, a frozen waterfall, the petrified Grand Gallery 20m/65ft high and the majestic "Cathedral" (40m/130ft) and its crystal waterfalls.