They're the modern-day titans of the seas; casually jaunting around the world from port to port.
Cruise ships these days are often dismissed as being enormous, ugly, hulking beasts, but photographer Jeffrey Milstein's interesting photography series takes a look at them from a rarely-seen angle: the bird's-eye view.
The New York-based artist captured the top-down images of seven huge cruise ships using a high-resolution camera, an open helicopter door, and a fair amount of bravery.
Included in the series is the Disney Dream, which includes a 9 hole mini-golf course, 11 nightclubs and lounges and a 765-foot waterslide, along with the Royal Caribbean Freedom of the Seas, the fourth-largest cruise ship in the world, which cost $800m and can accomodate 3,634 passengers.
Take a look at the all below and marvel at these miniature, mobile cities of the sea.
(Images: Rex/Jeffrey Milstein)