Situated on the southern side of the rocky outcrop, this natural and built heritage is of great biological interest, with particularly rich plant and animal life. Besides this site classified as exceptional Walloon heritage, pleasure gardens, vegetable gardens and vineyards complete this impressive wall of greenery. Open to tourism, these gardens include springs, crops of old-fashioned vegetables and special types of fruit. Eleven information panels (French and Dutch) shed light on the history of this natural site.
A map is available for free from the reception at the tourist information office.