The Sonian Forest or Sonian Wood is a 4,421-hectare forest at the southeast edge of Brussels, Belgium.
The Sonian Forest was a favorite hunting ground of the Habsburg Imperial family, and as such features prominently in some famous Renaissance works of art such as the Hunts of Maximilian tapestries in the Louvre.
The forest lies in the Flemish municipalities of Sint-Genesius-Rode, Hoeilaart, Overijse, and Tervuren, in the Brussels-Capital Region municipalities of Uccle, Watermael-Boitsfort, Auderghem, and Woluwe-Saint-Pierre, and in the Walloon towns of La Hulpe and Waterloo. Thus, it stretches out over the three Belgian Regions.
Wikipedia https://en.wikipedia.org/wiki/Sonian_Forest
Coordinates 50°46'31.167" N 4°25'57.311" E