4.Ithaa, MaldivesFive meters below sea level against the beautiful sea life of the Indian Ocean off the Maldives, Ithaa is a clear dome that seats 14 people amid the beautiful coral, fish, plants, stingrays and sharks. It cost around $5 million to build and they have to pay for that investment, so the food is ridiculously expensive. Just for starters, the 23-course tasting menu is $300. The food is mostly western with a little Maldivian influence.