One With Nature. The floating village of Brockholes Nature Reserve, Preston.
It can rise up to three metres, which would only be necessary in a catastrophe, but will regularly go up and down by 400mm over a year. Brockholes sits on a concrete raft, made buoyant by hollow chambers, held by four steel posts to stop it drifting across the lake.
Which would be amusing, admittedly, don’t you think?