The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Metro station with a claim to rock n' roll fame.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Go inside to really appreciate this 500-year-old technological masterpiece.