Château de la Mothe-Chandeniers, Les Trois-Moutiers, Poitou-Charentes, France. Image Source: Wimp/Infraredd/Flickr.
Here is a sample of urbex videos of ruined châteaux, mainly in France, Germany, but also from elsewhere in Europe. The makers of the videos often add music, which you may want to mute.
See all my posts on Urban Exploration.