After nearly 60 years, there's still a bear at Paddington Station looking for help.

A network of concealed passageways lies within a busy London Underground station.

This hidden green space is the city's second largest conservatory.

Hear the quietest sound from across the dome.

The final resting place to 300 Victorian-era pets hides inside the city park.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Catacombs turned marketplace.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

It commemorates one of the world's earliest telegraphs.

The monumental home of Prussia’s eccentric "Cannon King."

Tucked away in a small German apartment is an eclectic museum devoted to West African vodun culture.

At this cemetery, artists are invited to design their own gravestones.

A ruined castle made famous in German movies and TV productions.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

One room inside this building mesmerizes all with its parabolic dome.

A century-long search for a church that was never there.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

This monolithic slab of art metal crowns a German slag heap.

This gilded emblem was once stolen by a Cookie Monster impostor, who demanded a charitable ransom for its return.

The history of German architecture is explored across this fairy-scale mini-city.