- Weltnaturerbe Sonian Forest. Unesco - We are Europe's Wilderness - Ancient and Primeval Forests of the Carpathians and Other Regions of Europe.
- The vast Sonian Forest unites the three regions in our country, is 4,421 hectares in size, has trees dating back more than 200 years and is a home for many animals.
- Due to its popularity, the race track was expanded in 1907, and an additional section of the Sonian Forest was cut down to enlarge the race track.
- Measuring a grand total of 4,421 ha, the Sonian forest is Belgium’s largest area of woodland and the perfect place for some lovely walks.
- On 6 April 2016, EUSTAFOR and its Flemish member Natuurinvest organized an excursion to the Sonian forest.
- Forêt de Soignes / Zoniënwoud / Sonian Forest. WikiProject Belgium/Cycle Routes. LF2. LF6. RV10. ICR / GFR 4. ICR / GFR 5B. ICR / GFR 6A. ICR / GFR MM.
- Photos of forest Sonian Forest. Par GdML — Travail personnel, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=84543885.
- This circular 11 km Sonian Forest walk takes in memorials to foresters killed during World War One, and the terrorist attacks in Brussels in 2016.
- The Sonian Forest is a 4,421-hectare (10,920-acre) forest at the southeast edge of Brussels.
- Painted map of the Sonian Forest (Ignatius van der Stock, 1661). The forest is part of the scattered remains of the ancient Silva Carbonaria or Charcoal Forest.