The Larcuste Cairns are hidden in the middle of farmland near Colpo in Brittany. They appear to be on private property, since you walk through cultivated fields to reach them, but are open to the public. I don't want to cause a stampede to this quiet village, but if you're of a considerate nature and keen on prehistory, a trip to the cairns is an interesting experience.
The Fortress of Largoet boasts one of the tallest keeps in the world at forty-five metres. It's an impressive hexagonal tower, now ruled by pigeons who bombard unsuspecting visitors with biological weapons as they step into the hollow stone shell that was once an abode of considerable standing. The castle was an important part of Brittany's defenses against France, and the future Henry VII of England, who would later found the Tudor dynasty, was imprisoned here for his own protection as a boy. As a result, he avoided assassination and is said to be the last monarch of any kingdom to speak Breton.
Inspiration for tales of mystery and suspense? You better believe it!