I don't know if it's completely what you'd class as anime, but 'Oban Star Racers' was fantastic. And 'Last Exile', that was some really cool worldbuilding. 'S

I don't know if it's completely what you'd class as anime, but 'Oban Star Racers' was fantastic. And 'Last Exile', that was some really cool worldbuilding. 'Scrapped Princess' would also be up there, but it unfortunately had a bit of a lackluster ending.