This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

"Unity, Creativity, Beauty."

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

The temple that withstood the Nazis.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

The 14th-century ruins are said to contain healing powers.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

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

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

A giant glider—designed by the father of the Rubik's Cube's designer—now soars within a shopping mall.

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

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

A collection of intricate sculptures so small they have to be seen through a microscope.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.