Vertical Cities

Dubai City Tower - 7,874 ft.



Ultima Tower - 10,554 ft.


X-Seed 4000 - 13,123 ft.














Added imagined structures, note: all these structure are possible through advanced nanotechnology
X-Seed 5000 - 500,000 ft.
X-Seed 6000 - 600,000,000 ft.
X-Seed 7000 - 700,000,000,000 ft,
X-Seed 8000 - 800 trillion ft.
X-S 9000 - 900 nonillion ft.
X-S 10,000 - 10,000 myrillion ft.

Great 1000 Tower - 1000 gaxillion ft.