This is FLIP, an ocean vessel that can actually flip on its side and keep on a-floatin'. FLIP even has two sets of interior furnishings for long term floating in either position.
The Floating Instrument Platform is celebrating 50 years of staying afloat no matter what the high seas throws at it.
Hit the Laughing Squid link below if you're interested in reading more about this amazing vehicle and FLIP ON!
Link --via Laughing Squid
Odd that it's the only one ever built. One would expect that megalomaniacs the world over would want a transportable yet stable platform to hide out on.