Other more complex chemicals in small quantities must be responsible for the orange color as seen from space. Recent ground-based radar observations have cast this into doubt, however. The landing site for the Huygens probe has been chosen in part by examining these images. The observations by HST also indicate that Titan's rotation is in fact synchronous like most of Saturn's other moons. There are a lot of organic compounds and a potentially liquid environment on Titan.
Titan is one of the best possibilities .
In any case, it's interesting as a comparison with the early environment on Earth.