i would like to spend time there !
this place is called La cabane perchée.
It's a company that has set up houses in the trees like this in France, Belgium, Portugal, ...
there is a beautiful island off Britanny's coast in the West of France called l'île de Groix.
Thereare also small tree houses there called nests.
My sister tried it and loved it and i wish i could sleep there someday.