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.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

Time stands still at this serene burial ground in the center of Budapest.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A fake Transylvanian castle houses a cathedral of antlers.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Museum dedicated to the terror regimes of Hungary.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Electrical curiosity museum housed in an old transformer station.