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

An ancient knight and a symbol of the city's freedom.

A church of bones, decorated with 40,000 human skeletons.

A saintly relic hidden in a Prague church basement.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Macabre astrological automaton clock dating to the late 1400s.

Monument to a suicide protesting the Soviet invasion.

Largest illuminated advertisement sign in the world.

Twisted buildings adorn the banks of the Rhine river.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Take a walk in a recreation of ancient Rome.