The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Every color in the rainbow awaits.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Finland's oldest astronomical observatory once played a crucial role in seafaring and timekeeping.

Roman-era ships unearthed...

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This small, ingenious cannon once helped regulate Parisian life.

Japanese company creates clone dolls that reside in the "uncanny valley."

A 20-meter (65-foot) robot towers over Tokyo Bay.