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

Every Tuesday, students let off steam by screaming into the night air.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

One part local history, 99 parts gruesome haunted house.

The last four extravagant street signs of London's historic banking street.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

The sign at the garden gate reads: "These Plants Can Kill."

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

This curious sculpture represents the perseverance needed to take to the skies.

Puppet theater and museum holding a collection of more than 300.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Floating swimming pool within a moored vessel.

A 12th-century fortress containing some of Berlin's oldest buildings.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.