Underwater
Jules' Undersea Lodge
USA
Dive to your front door
A 1970s marine research habitat converted into a two-bedroom lodge on the floor of a Key Largo lagoon — the world's only underwater hotel you scuba into, surfacing through the open moon pool in its wet room. Round portholes glow green with passing fish, and yes, pizza is delivered by diver. The catch: The front door is roughly 21 feet underwater — you must scuba dive to check in, so non-certified guests first take (and pay for) an intro dive course, and per-person rates run steep.