Comment below what you think.Personally I would pick Neptunes moon Triton because of its awesome ice geysers!
Wow guys,this has become alot more popular than expected 100+!? Europa and Pluto are winning by landslides
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The city below the tower. Make it a new area you can go to from the tower like taking a elevator down and when you get there it should have new shops and stuff I don't know what exactly but I think it be cool to explore the city