Underwater hotels: The Fab Five Manta Resort, Pemba Island Located some 13ft (four metres) beneath the surface of the Indian Ocean, guests sleeping in the hotel's Manta Underwater Room are cocooned in a glass-walled, underwater chamber while, above sea level, two additional levels finished in local hardwood provide space for leisure. Those wishing to observe passing sea life are likely to see shoals of reef fish drift past during the day and, at night, when underwater spotlights beneath each window burst into action, more reticent creatures, such as squid and octopus emerge. Bat and trumpet fish have also sought to elude predators by settling by the structure, while coral is developing around the base of the room and its anchoring lines. Follow @TheHotelegraph on Twitter for the latest in hotel news and reviews