The former sand quarry at Gentissart, located between the villages of Tilly and Mellery, was acquired in 1996 by the Province of Walloon Brabant with a view to creating a teaching and biological interest site….

Site du syndicat d'initiative
The former sand quarry at Gentissart, located between the villages of Tilly and Mellery, was acquired in 1996 by the Province of Walloon Brabant with a view to creating a teaching and biological interest site….
The oldest parts (schist) of the old mill of Hollers date back to the 13th and 14th centuries and the 18th and 19th centuries for the newest ones (bricks)….