This Canadian ferry has led many lives: first as a cargo vessel on the St. Lawrence River, next as a 1960s showboat, and now as Bota Bota, the first-ever floating spa.
Docked at the Old Port of Montreal, this steel ship has been revamped in the look (and function) of a Scandinavian Spa, replete with relaxation rooms, saunas, steam baths and a health-minded restaurant--all with dramatic views of the city's skyline.
As you might expect, water is a key component here. Each treatment begins with a pore-opening "water circuit," which will have you alternating between steam room and cold bath, before settling into a relaxing hammock or jacuzzi. Next guests move on to the treatment(s) of their choice, like a Swedish massage ($90 to $130), Cocoa Wave Body Wrap ($95) or Bamboo Dewdrop Hydrating Facial ($85).
There's even a nail-salon-cum-cocktail-lounge where you can nurse a fruity concoction before (or during) your mani-pedi ($70).
Since you pay by the hour to be on board, you will eventually get kicked off the floating oasis. But don't worry about it going anywhere--the engine was removed to accommodate the underwater changing room.