Base
The Xavier Institute, Salem Center, Westchester County, New York State, (mantan) The Alley (ngisor Manhattans lumahing), X-Factor Apa starships sentient
(Saiki) Profesor Charles Xaviers Institute for luwih Learning, Salem Center, Westchester County, New York (mantan) Muir Isle, Skotlandia ,; a kandang ing Soho, Manhattan, Ust-Ordynski Bebarengan, Lake Baikal, Siberia, USSR, X-Men Markas ing Austra