Tombeau du Géant, River meander in Bouillon, Belgium

Tombeau du Géant is a river meander where the Semois has carved a sharp horseshoe-shaped valley through densely forested hills. The site is framed by steep limestone cliffs that rise above the narrow riverbed.

The hill was listed as exceptional heritage of Wallonia in 2016, together with several surrounding lieux-dits, under four separate entries (nos. 84010-PEX-0003-03 to 0006-03). It is also classed as a natural landscape of interest. The site lies on the left bank of the Semois, a few kilometres downstream from Bouillon, while the loop of Frahan lies further downstream.

The name comes from a legend that after the defeat at the Battle of the Sabis in 57 BC, a tall Treveri warrior threw himself from the Rocher des Gattes rather than be taken prisoner and die in Rome. The hill is also called the Tomb of the Giant for this reason.

Multiple observation points are reachable via well-marked hiking trails that connect the villages of Rochehaut, Botassart, and Corbion. The area is accessible year-round, though sturdy footwear is recommended because the paths can be steep and slippery.

The best-known viewpoint lies near the village of Botassart, about 450 m as the crow flies from the Semois and roughly 140 m above the river. From there the wooded hill, which rises to 250 m, sits inside the loop of the water.