The château, Rochefort-en-Terre

As you would expect, the château is right at the top of the hill and offers commanding views over the surrounding countryside.  The building itself was closed on the day we visited, but it's still worth going, to see the outsides and the views from the hilltop.  (And the Niais museum is just next door)

The wrought iron gate in the picture looks like it guards the entrance to the garden, but it it set in a short length of wall that you can walk around.