Seattle Underground (Bill Speidel's Underground Tour)

The subterranean passageways beneath Pioneer Square were exposed when the city rebuilt after the Great Seattle Fire of 1889 and are now presented on guided tours run by Bill Speidel's Underground Tour. The tour office and entry point is at this address, and the underground spaces have long been the subject of ghost stories. Visitors and guides have reported unexplained sounds, footsteps, and occasional apparitions in the underground sections, claims that are part of the site's tour narrative but remain debated.