It's a high-security prison - on an island surrounded by water. Escape is almost impossible. The water surrounding the island is deep - with fast flowing currents.
Around 30 feet
about 6km
A water-filled trench around a castle is known as a "moat."
Stop and back out. Find another route around the water.
true
It is 123740 miles deep
The Old Bahama Channel is a deep-water passage between the island of Cuba and the Great Bahamas Bank.
You can find most of them around the border of a widely vegetated island. You can also find them deep under the ocean and in seas.
A tract of land surrounded by water, and smaller than a continent. Cf. Continent., Anything regarded as resembling an island; as, an island of ice., See Isle, n., 2., To cause to become or to resemble an island; to make an island or islands of; to isle., To furnish with an island or with islands; as, to island the deep.
Around 22,870 liters of water.
Deep Water