Woluwe in the context of Machelen

The Senne (French, pronounced [sɛn] ) or Zenne (Dutch, pronounced [ˈzɛnə]) is a small river that flows through Brussels, Belgium. Its source is in the village of Naast near the municipality of Soignies. It is an indirect tributary of the Scheldt, through the Dyle and the Rupel. It joins the Dyle at Zennegat in Battel, north of the municipality of Mechelen, only a few hundred metres before the Dyle itself joins the Rupel.

In total, the Senne is 103 km (64 mi) long. The Woluwe and the Maelbeek are some of its tributaries.

Auderghem (French, pronounced [odœʁɡɛm] ; former Dutch spelling) or Oudergem (Dutch, pronounced [ˈʌudərɣɛm] ) is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the south-eastern part of the region, along the Woluwe valley and at the entrance to the Sonian Forest, it is bordered by Etterbeek, Ixelles, Watermael-Boitsfort, and Woluwe-Saint-Pierre, as well as the Flemish municipalities of Tervuren and Overijse. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).

Despite large roads slicing through and the increasing traffic, the municipality has an environmental advantage, and it has been able to preserve a relatively important part of its natural and historic legacy: the creeks, Rouge Cloître Abbey and its art centre, the Priory of Val-Duchesse, the Château of Trois-Fontaines, the Château Saint-Anne, and St. Anne's Chapel.

Woluwe-Saint-Pierre (French, pronounced [wolywe sɛ̃ pjɛʁ] ) or Sint-Pieters-Woluwe (Dutch, pronounced [sɪnt ˈpitərs ˈʋoːlyu.ə] ) is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the eastern part of the region, it is bordered by Etterbeek, Auderghem and Woluwe-Saint-Lambert, as well as the Flemish municipalities of Kraainem and Tervuren. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).

As of 1 January 2022, the municipality had a population of 42,216 inhabitants. The total area is 8.94 km (3.45 sq mi), which gives a population density of 4,722/km (12,230/sq mi). It is mostly a well-to-do residential area, which includes the wide, park-lined, Avenue de Tervueren/Tervurenlaan, and the numerous embassies located near the Square Maréchal Montgomery/Maarschalk Montgomeryplein. Of the three streams that once crossed the municipality, only the Woluwe, a tributary of the Senne, can still largely be seen today.

Woluwe-Saint-Lambert (French, pronounced [wolywe sɛ̃ lɑ̃bɛʁ] ) or Sint-Lambrechts-Woluwe (Dutch, pronounced [sɪnt ˈlɑmbrɛxts ˈʋoːlyu.ə] ) is one of the 19 municipalities of the Brussels-Capital Region, Belgium. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch). In French, it is often spelt Woluwé-Saint-Lambert (with an acute accent on the first e) to reflect the Frenchified pronunciation of what was originally a Dutch place name, but the official spelling is without an accent. The Woluwe stream, from which it takes its name, flows through the municipality.

As of 1 January 2022, the municipality had a population of 58,541 inhabitants. The total area is 7.29 km (2.81 sq mi), which gives a population density of 8,018/km (20,770/sq mi). It is a prosperous residential area, with a mixture of flats and detached, semi-detached, and terraced houses, often compared to Uccle, another affluent Brussels municipality, as well as the 14th or 17th arrondissement in Paris.