This tremendous timepiece was once the largest cuckoo clock in the world.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Legendary site where an evil bishop was devoured by rodents.

Tiny castle in the middle of the Rhine made you pay to pass.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

Largest illuminated advertisement sign in the world.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

One of the only spherical 19th century gas containers left today.

World's only telecommunication tower with a wooden pinnacle.

A German apartment building hosting as many trees as human occupants.

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

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

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

Hear the quietest sound from across the dome.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This is the oldest Roman-made bridge in the city still existing in its original state.

A massive marble foot is tucked away in a small alley near the Pantheon.