This building has survived for more than a century and remains virtually untouched.

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

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

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

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

One of the world's heaviest musical instruments towers within a popular urban park.

The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

A Byzantine-era church hidden in a wooded area below the Acropolis.

Where commuters walk through remnants of an ancient Greek necropolis.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

An ancient octagonal weather station named for the eight Greek gods of wind.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

Preserved behind glass, the ruins of a medieval building used to store human remains.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.