Cutting-edge architecture, or weird starship design? Sometimes it's hard to tell. In our quest for buildings that look like famous spaceships, we came across some even more striking images that should be spaceships. Gallery below.

Oslo's new opera building on Saturday April 12, 2008, a futuristic structure set to become an architectural landmark. The opening ceremony ended with a huge fireworks. (AP Photo/Scanpix, Kyrre Lien)

BIRMINGHAM, UNITED KINGDOM - JANUARY 15: The futuristic landmark Selfridges store in Birmingham dominates the skyline of the city's Bullring Shopping Centre on 15 January 2007, Birmingham, England. Birmingham's Bullring Shopping Centre has become one of the UK's favourite landmarks according to a recent survey. The building covered in aluminium discs beat off competition from Edinburgh Castle and Tower Bridge to be named one of the UK's favourite landmarks, chosen third behind The London Eye and Big Ben. (Photo by Christopher Furlong/Getty Images)