Movies and animations
Petite Princess Yucie
Petite Princess Yucie is an Japanese anime TV series, which follows the adventures of country-girl Yucie as she is admitted by chance to the prestigious Princess Academy, where the daughters of royalty and nobles attend to learn magic, dance, etiquette, defense, art and music. There, she experiences many things in her quest to collect the "fragments" of the Eternal Tiara in hopes that she may become the legendary Platinum Princess, who is chosen every 1,000 years.
In episode 12 "Challenge! Heaven Triathlon", searching Crystal Flowers, she and other challengers go to Heaven and see flying city Tenkai, which architecture contradict gravity laws. Below, you can see screenshots from the episode.
You can see the full episode at http://anilinkz.com/petite-princess-yucie-episode-12.