10. The Apeiron island hotel

9. Foldable hotel pods

8. The hotel Burj al-Arab

7. Waterworld

6. The Poseidon Undersea Resort

5. The Hydropolis: A self-acclaimed 10-star underwater hotel

4. The Lunatic Hotel: Hotel on the Moon

3. Aeroscraft: The flying luxury hotel of tomorrow

2. Galactic Suite

1. Commercial Space Station Skywalker: The inflatable space hotel