This link will create a polar panorama of any Google Street View location.
A spectacular 24-hour photographic exposure of the sky transforms the Greek Church of Saint John into an island floating in space. A technical explanation of the shot. Crescent moon and Poseidon Temple, by the same photographer, Chris Kotsiopoulos. Much more at greeksky.gr and Earth Science Picture of the Day. [more inside]
Planet Sydney. Planet Joshua Tree. Planet Kyoto. Sadly, you can't visit any of these worlds, but you can make your own.