This is the Château de Brocéliande which looks out on to the Lac du Pas de Houx - which translates - rather prettily - as the Holly Path Lake. The château has no particular architectural or historical merit being simply a family home built at the beginning of the 20th C - it always photographs well though.
Nicer viewed on black I think.
This image is SOOC and is part of my ongoing OCOLOY project - you can read more about it in my profile.