First it was outdoor showers and private plunge pools, next it was overwater rooms with glass floors. Hotels and resorts are constantly trying to break new ground and offer guests unusual experiences in the quest to stand out from the crowd. Water seems to be a common thread in many novelty-driven offerings, but the new trend of creating underwater living spaces involves a great deal more investment than installing an in-room Jacuzzi. is underwater hospitality a genuine trend of the future? or is it a passing fad with unknown environmental consequences?