This five-person submersible can descend to depths of up to 656’, meaning it’s potentially able to access wrecks, reefs, and deep underwater species. All of the explorers are ensconced in 3.25”-thick acrylic pressure sphere that allows for underwater conversation (unlike Scuba gear). Its two horizontal thrusters provide aft, fore, and directional control, as well as a max submersed speed of almost 3 mph (2.5 knots). The two lithium battery banks provide up to eight hours of continuous undersea exploration, and the broad freeboard ensures awesome surface stability. Basically, if you’re rich and have childlike fantasies of finding lost treasure, this is the toy you want for the job. There’s also a two-person version available for the bargain price of $2,000,000 from Hammacher Schlemmer.