Swallow's Nest Castle looks like something from a Disney movie. In fact, since Disney are so big on live-action remakes of classic films at the moment, we wouldn't be surprised if they came and shot something here. That way, this gorgeous building wouldn't be so lonely.
The location is the issue here. Swallow's Nest was built by a wealthy oil merchant in 1911, who hadn't given due consideration to how close to the cliff edge his development was. It's structurally unsound, and will one day fall into the sea.