A 200-year-old collection of oddities and medical paraphernalia.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

A marvel of Byzantine engineering under the streets of Istanbul.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The second oldest anatomical theater is housed in a museum of curiosities.

The first museum in the world devoted to sexual gadgetry.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

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

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Two stunning 17th-century libraries and a cabinet of curiosities.

The deepest metro station in the world.

A collection of collections ranging from dentistry to minerals.

An abstract monument to a symphonic composer.