The Spalding Building in Portland, Oregon, has perhaps the most formidable-looking bicycle storage facility in the world. It consists of repurposed bank vaults:
Tenants of the 12-story structure can lock their rides up in one of two vaults converted to bike storage in the ex-bank part of the building (and scrub down in the nearby showers after the commute).
Actually, they're just for show. The steel doors can't lock. That would probably be too dangerous for users.
Link via NotCot | Photo: BikePortland.org
Previously: Bicycle Lock Climbs Lamp Post to Escape Thieves