An ancient Egyptian temple in the middle of Madrid, Spain.

Two large posteriors in one giant statue.

The much-loved protagonist of famed Argentinian comics can be found sitting on a park bench.

The surviving remnants of a destroyed medieval church now stand in a public park.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Giant topiary dog once played a role in a terrorist bomb plot.

These sculptures of various animals adorn the building that houses one of the capital's least known museums.

The former home of the world-famous Templeton Carpet Factory.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

An architectural oddity hides in plain sight on this iconic London bridge.

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

An artistic tribute to the famous singer, just around the corner from where he was born.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

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

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

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

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

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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.

Modest by day, illuminated majestically at sunset.