These abandoned sea forts have been turned into luxury hotels

Back in the mid-19th century, Britain constructed three Solent forts to protect its most important naval base against attacks from Napoleon III's navy. Now, over 150 years later, they're being turned into luxury island retreats.

Located in Portsmouth Harbour, the three forts include Spitbank Fort, Horse Sand Fort, and No Man's Land Fort. Once armed with 12.5-inch muzzle-loading (RML) guns, the disarmed forts now serve a wholly different purpose.

These abandoned sea forts have been turned into luxury hotels

These abandoned sea forts have been turned into luxury hotels

These abandoned sea forts have been turned into luxury hotels

Spitbank Fort is now a luxury hotel with eight suites. No Man's Land is still under development, but will become an even larger hotel featuring 27 bedrooms. And Horse Sands is a museum.

These abandoned sea forts have been turned into luxury hotels

Spitbank includes a recreation room, spa, outdoor heated pool, a Victory Bar, and a fire pit area with a spectacular view of the Isle of Wight.

These abandoned sea forts have been turned into luxury hotels

Patrons can book the facility for weddings or themed events. Or you can book the entire thing for yourself and bring 17 of your closest friends.

These abandoned sea forts have been turned into luxury hotels

These abandoned sea forts have been turned into luxury hotels

These abandoned sea forts have been turned into luxury hotels

These abandoned sea forts have been turned into luxury hotels

The entire project cost over $4 million.

[Via My Modern Met; photos: Clarenco LLP via Yatzer]