The planet Ziost was one of the ancient homeworlds of the Sith. Within the planet lies an ancient fortress which served as meeting place for legendary Sith Lords such as Ludo Kressh and Naga Sadow.

The “Z'nox Chamber” is the psi-shielded chamber located underneath the X-Mansion. It was created by Professor X to prepare for the arrival of the alien Z'nox but has since served the X-Men as a general area to avoid telepathic probes.

Red Martian city.

An ancient White Martian stronghold confiscated from the Hyperclan by the JLA, later the personal base of operations for the Martian Manhunter.

Zoohurst is a weird place designed by Zeta Spex to symbolize the diversity of the Shadow Zone. In Zoohurst most buildings and some people look like animals, and some regular animals may talk, too, and then there's some regular aliens and such.

The Fifth Dimensional planet inhabited by magical imps.

A bizarre planet during the Silver Age of DC comics.

The largest city in Switzerland.

Homeworld of legionnaire Brin Londo aka Timber Wolf.