The "Jumelles" tree house (jumelles=twins) is the tree climbing tree house of the Estate. It is a big tree house for 2 to 4 persons (aged 8 years onwards), built on an oak tree with a tree fork whence its name. It is accessible by a small tree climbing circuit, it is inaccessible to persons prone to vertigo: The circuit consists of a staircase, a steel scale, an adventure-style suspended walkway 15m long (suspension rope bridge with a net), and finally a step ladder. The cabin is built at a height of 10m.