Located a few miles off the coast of England's Portsmouth and the Isle of Wight are three sea forts that would be the envy of any Bond villain.
Spitbank Fort, No Man's fort, and Horse Sands Fort are currently on the market for between $980,000 and $5.5 million each. All built at the same time, Spitbank and No Man's Forts are now popular luxury hotels, while Horse Sands is yet to be renovated.
Collectively known as the Solent Forts, the nautical landmarks can be traced back to over 160 years ago when they were built to protect the UK from the threat of invasion from France led by Napoleon III. Commissioned by Prime Minister Lord Palmerston, the forts took 15 years to build — by which time the threat no longer existed and there was no use for them.
Later used as military holdings and communication points during World War I and World War II, in the 1980s the Solent Forts were then purchased and used as everything from museums to the locations of various raves and British television shows.
In recent years, all three forts were purchased by UK-based investment company Clarenco who converted two of them to their current forms. Clarenco's chairman, Mike Clare, bought Spitbank Fort in 2009 with renovations starting in 2010. No Man's Fort was purchased the same year, followed by Horse Sands Fort in 2012.
Now the forts are looking for a new owner. Here's a look at what each one is like inside.