Cayman Brac is an island that is part of the Cayman Islands. It lies in the Caribbean Sea about 90 miles (145 km) northeast of Grand Cayman and 5 miles (8 km) east of Little Cayman. It is about 12 miles (19 km) long, with an average width of 1 mile (2 km). Its terrain is the most prominent of the three Cayman Islands due to "The Bluff", a large central limestone outcrop that rises steadily along the length of the island up to 140 feet (43 metres) above sea level at the eastern end. The island is named after this prominent feature, as "brac" is a Gaelic name for a bluff.
The Teignmouth Electron, the boat in which Donald Crowhurst attempted to sail round the world single-handed in the Sunday Times Golden Globe Race, has been left to decay on the south coast of Cayman Brac.