This 135-year-old weather station studied the effects of the climate on human health.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

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

This museum inside a museum tells the story of London's timepieces.

The last four extravagant street signs of London's historic banking street.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Two plaques commemorate the site of Shakespeare's first theatre.

A famous burial ground with a history both grim and literary.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The largest of London's subterranean rivers and once a mad, bad center of London life.

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

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

A hands-off space for graffiti artists to hone and display their skills.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

A naturally mummified 2,000-year-old man.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

Charles Babbage's proto-computer, painstakingly brought to life.

The Tudor-style cottage in the middle of the square is not quite what it seems.