It's almost enough-- not quite-- to make me consider having an aquarium again.
The fine folks at Aqua Forest Aquariums have many beautiful examples of extreme aquarium "land"scapes to delight your eyes and make your favorite fishies feel right at home. Follow the link and scroll and scoll...
I think they are works of living art on the order of bonsai and zen gardens. I'd have to hire someone to maintain the thing, however. An "aquarium boy." Now that there's a whole new job description for the workforce dedicated to leisure housewife set. But I'm thinking the "aquarium boy" would be the exact opposite of the "pool boy."