I was sure I was only going to vote for only one entry this time, but after looking at the entries again... I had to vote for 3. Excellent work!
Abu's Flying Island of Asun by Abu Lafia
Holoste-Castle in the Sky by Bogie
Arctic Base 01-03-63 by damonjynx
The flying city of Badieux by dvg94
Dyson's Floating Isles by Dyson Logos
Steam Island by icemaneli186
Temple of Knowledge by jpstod
Laihlimmo Celeste by mixerbach
Rugtown by Straf
Space Oddity by thomrey
Ruven by Tulio Botinha
Hiria Hegan by UrbaNick6
I was sure I was only going to vote for only one entry this time, but after looking at the entries again... I had to vote for 3. Excellent work!