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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Io, Titan, and Triton. Io: lava flows Jupiter being right there. Titan: oceans and rivers and rains of liquid methane. With lakes of oil, and in constant darkness. Triton: jets of liquid nitrogen. There is more. But those would be my top 3.