Mysterious standing stone formations looks like a petrified forest.

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

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Amidst towering office buildings, a local pub lives inside Sheffield’s oldest surviving domestic building.

A memorial to the atrocities of the People's Socialist Republic of Albania.

What happens when you cross a mayor and a painter?

A museum dedicated to secret surveillance.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

Presented to the city in 1910 for public use, these brass markers show varying lengths.

The once-a-day siren is a reminder of the days before time was standardized.

This police call box harkens back to an era of pre-radio communications, and has a rather unique feature.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.

Located behind the Riverside Pub is a nautical fantasy from one of the area's renowned street artists.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

A Reformation-era fiery figurehead once denoted this location as a print shop.

Makers and sellers of the original and finest York Ghosts.

Some of the most enduring novels in English literature were written within the walls of this Georgian-era building.

This iconic Tudor home-turned-museum offers a unique glimpse into the everyday life of a prosperous family during the early modern period.