Villers-le-Bouillet shares its territory with two subwatersheds, of the Meuse and the Mehaigne.
The streams in Villers and those in Fize-Fontaine run into the stream in Bende, a direct tributary of the Meuse. The streams at Vaux-Borset, Warnant-Dreye and Vieux-Waleffe run into the Mehaigne. These two are separated by the Wallonia motorway. Villers-le-Bouillet is also home to an industrial park close to this important arterial road.
Despite the increasing urbanisation, the villages of Villers and Fize-Fontaine retain many traces of an impressive history. A Roman villa was excavated in the place known as "a trou" in Villers: Fize, with its small manor house, fief of the prince-bishop, then part of the ban d'Amay, is characterised by rural architecture dominated by the use of greywacke mined from the local quarry at Pierreumont. Villers-le-Bouillet, old manor of St. Barthelemy, is a major agglomeration which comprises several residential areas, and old hamlets reclaimed from the woods in the Middle Ages. The construction of the Huy-Waremme road enabled these different residential areas to join together in recent history.
Vaux-Borset, Warnant-Dreye and Vieux-Waleffe have retained a more rural character with the Toultia and Narméa valleys. The villages of Warnant and Vieux-Waleffe are character villages which have preserved a homogeneous architectural style, reflecting the Ancien Régime. Warnant, one of the prettiest villages in the Hesbaye, is grouped around a road with a circular design, a series of abbey and aristocratic farms overlooked by the Château d'Oultremont, set slightly back and overlooking the village. Vaux-Borset was one of the Omalien bases. Since the end of the 19th century no less than 9 villages belonging to this civilisation from the Danube have been unearthed, the Hesbaye being an area in which they settled. As for Vieux-Waleffe, it features a small manor, with buildings grouped around the château, church and main farm.
Industry was also quite a feature here in the 19th century. Coal was mined in Villers-le-Bouillet at the hamlet of Halbosart and marl at Vaux-Borset. Agro-food industries such as the flour mill and grinding mill were also set up in Warnant. They complemented the dominant activity in the area: agriculture.