The remains of the observatory of the Danish astronomer who first measured the speed of light.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This building featuring Brutalist architecture has a rich media production history.

The tiny, studious rodents greet visitors to the National Archives of Finland.

A subterranean house of worship carved right out of the bedrock.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

An abstract monument to a symphonic composer.

The steepest classic funicular in the world glides along a dizzying incline.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Zurich's evolution museum hosts a unique collection of skeletons among its natural history treasures.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

A science teacher's dream.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.