Military submarines are out there, lurking under the water, ready for action, but how long can they stay down there? It's longer than you might think.

The unlikely duo joined forces to build a war submersible to drive British warships out of Boston Harbor. The result was the Turtle, America's first submarine. With a 3-meter length and a 1-meter ...

You can also combine a ride on the submarine with a visit to Harrison’s Cave for $210 per adult and $120 per child. For more information, visit the official website. Barbados Catamaran Turtle ...