This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

One of the most easily accessible examples of the rare 1960s UFO houses.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A serious museum dedicated to two German comedians.

The largest statue of this convex, homogeneous object with just one stable and one unstable equilibrium point.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

How did an Australian statue of the Bard of Avon end up in the Hungarian capital?

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

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

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

These ornate arches show how the course of the River Thames has changed.

This ancient Egyptian obelisk still bears the wounds of World War I.

Giant, friendly pelicans in Central London, the most unlikely of places.

A unique tribute to the millions of animals who served and died for the British military.

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

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

This striking statue brings a scene from the African savannah into central London.