A rare example of this century-old British tank stands near the center of town in Ashford.

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

These ornate arches show how the course of the River Thames has changed.

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

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

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

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

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

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

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

This London marker celebrates the spot where the world-famous English band was founded.

A plaque marks the underground site of one of London's "lost rivers."

A cluttered and astounding collection of antiquities and curiosities.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

Once the home of a hermetic monk, this cave now houses a small church.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A museum in the childhood house of a medical pioneer.