This sculpture celebrates a boules tournament and the link between Leeds and its twin city Lille.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A gruesome combat between a hunter and a furious momma bear.

Amsterdam's former hotspot for public executions and dissections.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

Believed to be the former location of one of the earliest Viking assemblies in Europe.

One of the shortest streets in York has an especially odd name.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

Though much of the castle was robbed of its stones, the underlying earthworks are among the best-preserved in England.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

A bench and a bridge pay tribute to Birmingham's favorite heavy metal band.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

The ritual has been performed uninterrupted for nearly 700 years.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

A mysterious shape catches the eye in this 16th-century painting.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.