Abandoned Playgrounds... The Chateau de Singes (Castle of Monkeys) is also known as the Chateau la Folie (Chateau of Folly) but is really the Château à Cahaignes (Castle Cahaignes). It is located off Rue de Chateau (Castle Street) in Cahaignes, Eure, Upper Normandy, France. Built in the17th century and the last owner actually resided here until 2012 when he went into a nursing home. As of May 2014 the Castle remains unprotected by any Historical Monument Acts and is not a listed structure.