A 138-year-old British sea fort is now a floating luxury hotel

Once home to hundreds of soldiers, this floating fort is now a super luxe hotel that can house 18 lucky guests. Spitbank Fort dates back to the late 1800s, and was built to protect Britain from a French invasion led by Napoleon III.  Story by Sophie-Claire Hoeller and editing by Stephen Parkhurst Follow INSIDER Travel on FacebookFollow INSIDER on YouTube