<Li> In the film Steamboy, a "Steam Castle" was shown, which was essentially a floating city, kept in the air by means of steam that was directed towards the soil . </Li> <Li> Hayao Miyazaki's film Laputa: Castle in the Sky involves a floating city hidden in the clouds called "Laputa", a name borrowed from Swift's Gulliver's Travels . </Li> <Li> In the anime and manga One Piece there are Sky Islands, cities built on a specific type of cloud that has hard, land - like properties, allowing civilizations to have ground to traverse and build on using the same cloud material, along with an ocean - like cloud throughout, making it a close parallel to a normal earthbound island . The unique environment of the Grand Line, an equatorial ocean that circles the globe and possesses all matter of mythical weather patterns, islands and equally mythical sea - behemoths, allows for these Sky Islands to occur regularly - yet are so rarely witnessed even the denizens of the legendary Grand - Line perceive them as a myth . </Li> <Li> In the 2011 animated TV series ThunderCats, a race of Birdmen live above the clouds in a technological floating city named Avista, powered and suspended in mid-air by the Tech Stone, one of Mumm - Ra's four Power Stones . </Li>

In the floating worlds in the major japanese cities one could find