This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

The last of Amsterdam's original sea level markers remaining in place.

Tiny castle in the middle of the Rhine made you pay to pass.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

Legendary site where an evil bishop was devoured by rodents.

A striking 12th-century-style castle built on the edge of a cliff.

Enter the cabin of a life-sized Hindenburg replica.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Bell tower juts out from a village buried under a lake.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Europe’s oldest natural human mummy.

A unique bridge with an equally unique view.