A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

This 16th-century building features a flamenco stage on its ground floor and a torture museum on its upper floors.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

At the base of this tower, a plaque marks the original center point of the Netherlands.

This large open-air museum showcases the ordinary lives of the people of the Netherlands and pre-industrial crafts and practices.

The 20-mile causeway that separates the Netherlands from the sea.

Located inside Hoge Veluwe National Park, this museum began as the private collection of a prominent female art collector.

Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

This Dutch statue is a monument to the fictional shrew who brought doom to the city of Stavoren.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.