The Mars Curiosity Rover and the Mars Opportunity Rover have logged a combined distance of roughly 65kms of tracks on the Martian surface; it would truly be a ‘new world’ to be able to use the Mars Exploration orbital and ground data as the basis for a Zwift track. And given the smaller mass of Mars, relative to Earth, it could be an ideal place for recovery rides.
I suppose that Watopia would need a Stargate, or something, but that could aesthetically fit into the Jungle Loop.
I realize that there have been suggestions over the years for Sci-Fi scapes like Tron world or candyland, and I would not support those ideas. I am not suggesting science-fiction, I am suggesting science.
Ride On, NASA!