Historic slum of Tartu.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

Once a year, local students "clean" this statue with a champagne shower.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Near the site where the English Archbishop was born, you can find an emblem in the shape of a pilgrim's badge.

What might be the oldest living tree in London has survived fires, bombings, and estate agents.

Historic cuisine meets fine dining in a hotel-restaurant overlooking Hyde Park.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

The final resting place of a German diplomat's beloved companion.

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

This historic home of the author of Lawrence of Arabia, has a history of literary celebrities and monogrammed sleeping bags.

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

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

It holds a fabulously designed tribute to astronomer Edmond Halley.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

Before 1993, this historic-looking village—King Charles III's pet project—didn’t exist at all.

Constructed for defense, this fort oversaw the dress rehearsal for one of the largest invasions in history.

Enormous terracotta heads of Queen Elizabeth and Prince Phillip can be seen on the side of the road to Windsor.