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

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Once the home of a hermetic monk, this cave now houses a small church.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A Hungarian pharmacy museum with a box full of mummy powder.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

A preserved college lock-up that recalls a clubhouse approach to discipline.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

Although rarely used, there is still a hidden room for the royal family at the Stockholm central station.

The manor house where the Polish composer spent childhood summer holidays is now a museum and concert hall.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

A spherical "micro-nation" in the heart of Vienna.

"World machine" built by an untrained Austrian farmer.

Op-art architecture designed for happiness.

A surreal statue honoring Prague's favorite literary son.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.