So, everything we thought we knew about the major moons of Jupiter was just a bunch of poodle piddle. Airless, deep-frozen balls of dirty ice bombarded by radiation? Nope, come to Callisto; the Venice of Space. In other words, the water is filthy, the squares tend to flood, the gondolas are outrageously overpriced, and nobody who works in town actually lives there because the rents are insane.
Yup. Venice.