Abstract dinosaur models in London.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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

The television series' iconic giant foot was borrowed from this classical painting.

London's smallest police station is barely the size of a phone booth.

The broken skateboards that became a poignant memorial to a murdered skater.

This beautifully restored fortification kept the city safe for centuries.

Putting the "mod" in "modular" since 2000.

A measuring mishap led to these artificial stone ladies losing their stomachs.

Black cat statues guard this temple-like Egyptian revival factory.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A student driver's nightmare.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

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

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

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

"There's nothing there," and other lies the KGB told us.

A valley of unique erosion patterns lends to a view like nothing on Earth.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

With only one flight in and out a week, the unfenced runway at this small island's airport transforms into a seaside park for locals and visitors.

Groups of prehistoric tombs that dot the mountains of northern Oman.