Nautilus Undersea Suite at The Poseidon Resort, Fiji. Normally I don't post stuff like this, but wow. this is officially my dream vacation spot. I could spend hours lying in bed watching the fish swim by!
The outdoor pool at the Velassaru Resort in the Maldives is another exotic pool. Set inside a lagoon, the infinity pool offers a full glorious sea view with a wall that opens out onto an over-water terrace.