A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

A museum glorifying the life of Stalin, located in the city of his birth.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

Berlin's old airport.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

An eerie, derelict amusement park in Berlin.

Elevated freight railway turned wildly successful urban park.

Shoes and revealing shirts are not allowed inside this giant Vietnamese Christ.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

This deceptively salty lake looks like blushing pink lemonade.

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

A waterfall runs right through the middle of this Taiwanese shrine to the hundreds of workers killed while building a nearby highway.

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years and harbors many surprises.

A narrow strip of land is home to the tallest migrating dunes in Europe.

Launch site for nuclear war against Western Europe.