The Eastern façade opens on a large pespective which, beyond a nice French style garden, leads into a landscaped English Style Park going back to the early 19^th century and almost entirely surrounded by a wall.

More than 70 trees of the park have been classified as “remarkable trees” and are part of the heritage of the Walloon Region.  They include taxus, going probably back to 400 years, Atlas cedars (of which one is a blue cedar), giant sequoias, copper beech-trees (of which one is dwarf), linden-trees (of which one laciniate largeleaf linden), red American oaks, horse chesnut trees with red or yellow flowers, maple trees (including one sycamore with purple leaves), robinia pseudoacacias, a tulip-tree of Virginia, a black pine of Austria, a weeping ash-tree, red flowers hawthorns,  etc.

The park also has two walks lined with hornbeams, one of which, a 70 meter bower, is particularly romantic.