A quaint village where bomb casings from the Second Indochina War have been repurposed into mundane objects.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

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

The social hall of this former factory is a Communist-era time capsule.

A decaying, yet still functioning, work of communist architecture.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

An homage to the medieval rulers of Bulgaria.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

Have tea in a cemetery with a dazzling view of Istanbul.

The most metal church of all time was built in record time because of an international, pious pissing contest.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

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

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

An abandoned saucer-shaped monument in the Bulgarian mountains.

UNESCO-protected ancient burial ground.

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

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

A "miracle" that seems to produce more holy fistfights than holy revelations.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

An abandoned textile factory on the "island of crows" was home to Estonia's first workers' strike.

Old Danish castle immortalized in Shakespeare's Hamlet.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Nepal is home to the world’s tallest Shiva statue.