The bomb-ravaged remains of of a colossal Neptune.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

This sculpture honors the man who was known as the "Righteous Among the Nations."

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

This monument depicts a harrowing event involving an escaped polar bear.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

Near this coastal cave stands a small memorial to the hermit who made it his home for three decades.

A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

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

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Eighty million natural history specimens call this gargantuan museum home.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The bones of two medieval royal lions were discovered at the historic fortress.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

A tribute to an explorer and naturalist often overlooked by history.

The pockmarks across the building's facade are remnants of the Blitz.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

An ornate and disused early 20th-century building has been given new life as a fully operational structure, complete with offices, oyster bar, and a furniture retailer.