Scubacraft

http://www.switched.com/2009/10/24/s...r-a-mere-164k/

For 164k $ you can buy one. Pretty neat.

The Scubacraft is precisely as cool as it sounds. It is a boat capable of operating above or below the waves at the whim of its operator, and it has, in our eyes at least, rendered all other forms of aquatic transport obsolete. (We really have a thing for James Bond). While above water, the Scubacraft is propelled by a healthy 160-horsepower engine. When submerged, the craft can reach a depth of nearly 100 feet. Electric thrusters move the Scubacraft along its way while underwater. To be clear, this is not an enclosed submarine, so SCUBA gear will have to be worn in order to dive below.