Looks familiar ? hehe.. i love water and I think Sandy Cheek's Tree Dome is a great, super great idea!! besides, what could be nicer than 'igloo'-like house ?

Similar house has been used in other story like Dragon Ball. it's just still on the land, but Tree Dome..simply marvelous.

Also, the idea of placing one big tree inside .. i love it.. i'd love to stay there :)