Although it's called an underwater sports car, the Aquarius is really just a personal submarine, as the only way it'll move on dry land is if you shove it down a steep hill. Once you get past the disappointment of not being able to drive off the Golden Gate Bridge and dive into San Francisco Bay, however, you should be pleasantly surprised by the little sub. Able to take you down up to 100 meters into the watery depths, it has all the necessary life support to keep you submerged for 72 hours. It can "race" along at a water-boiling 7 knotts, allowing you to scare the hell out of the sea life you're purporting to observe. Of course, beyond needing to have the mental capacity to pilot a submarine, you'll also need to be pretty loaded, as the Aquarius will set you back a cool $1.5 million. No discount if you really are an Aquarius, either. — Adam Frucci

World's First Underwater Sports Car, via Born Rich