Staying in a luxury hotel is always a thrill, especially if it's on the water, but no cruise ship or yacht can truly compare to the opulent luxury of a 19th century marvel intended to stand guard against Napoleon III's army. Just off of the coast of Portsmouth, England, the "Spitbank Fort," has now been converted into a secluded eight suites including island views, a spa, heated pool, a bar, and more.

While the other fort, "No Man's Land," is still under construction (and promises to accommodate more people), the Spitbank Fort is fully set up and ready for business. It cost approximately $4 million in order to properly revamp this military vessel into a chic luxury hotel. It's not too shabby for a piece of 19th-century equipment. 

[via Designtaxi]