Booster Golds' Mansion

Back in his days of fame and fortune Booster created a mansion for himself. While he would later destroy it when attempting to flee to the future he had offices for Dirk, Trixie and himself. There were labs, bedrooms for Michelle and him, along with other goodies. I love looking at blueprints and maps so I do wish more comics had these sort of things. Not shown is the other side of the house along with the rocket powered doors. Yes, I'm serious.

Chronopolis

Chronopolis is a city that is unaffected by the passage of time. Because of this most of the events taking place inside it's walls are happening simultaneously though it's visitors are only aware of this when time fluxes around them to show "ghosts" of events that have either happened or will happen.The city was co-created by Gravesend, a mysterious being that runs the city before he comes in contact with an adult Walker Gabriel. 

Many time travelers visit the city, one of the ways being through the Trans-Avant-Garde that runs directly into the citys' terminals. The city holds many secrets into Walkers' past and future. 

Fate?: Unclear. In one future The Countess ends up claiming ownership over it. While in another it's other creator returns.