Soldier Island (also known as "Indian Island" and "Nigg*r Island" (._.) in previous editions) is the setting of Agatha Christie's novel And Then There Were None. It has many names, U.N. Owen with help from Isaac Morris, buys the island. It is used as a place to kill himself and 9 others.
It is an island set off the coast of Devon, completely cut off from the mainland, and reachable only by boat.