Currently unrevealed, formerly Asteroid M; various hidden bases on Earth including one in Antarctica; an island in the Bermuda Triangle; Professor Xaviers School for Gifted Youngsters, Salem Center, Westchester County, New York
Lighthouse, Earth Orbit; Starlight Citadel, Otherworld; formerly Braddock Manor; Braddock Lighthouse, England; New York City (during exchange trip, specifically Peter Parkers Manhattan apartment); flat near Thames University, London