Got an extra $5 million? If so, you could rent Serene -- but only for a week. The 439-foot superyacht is one of the world's most expensive yachts for charter.

The money goes a long way though. Serene has two helicopter pads, a helicopter hangar, a bandstand, dance floor, movie theater and a submarine. Then there's the giant aft "beach club," complete with pool, sauna, hot tub, steam room and snow room.

Play: What super rich celebrity do you spend like?

There's also a copper-plated "Nemo room" buried deep in the hull with a glass bottom to view the fish. The yacht cost $330 million to build.

Serene has room for 24 guests in 12 cabins, plus a crew of 52 -- not a bad service ratio.