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

The mystic whose incorrupt corpse still attracts the faithful.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

A little-known, yet charming glacial lagoon.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

This outsider art house has gone from clinical creation to astounding artwork.

Most prolific publishing house in the 1600s open to the public.

This windmill has been grinding pigments for traditional paints for more than 200 years.

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

This 19th-century zoological collection has withstood the test of time.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

Remarkably preserved body discovered in a peat bog.

A chapel quietly preserves the remains of Father Damien, who devoted his life to caring for leprosy patients.

This statue of the Virgin and Child is said to have miraculously changed its position during the 1692 earthquake.

A uniquely preserved neo-Gothic church that is now home to a collection of art and woodcarvings.

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

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

A beautifully preserved and hidden 16th-century alleyway, tucked behind an unassuming door.

This former cigarette factory was built in a style inspired by Islamic architecture.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

A grassy pyramid named after a French battle.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.