A former palace transformed into a mausoleum for North Korea's supreme leaders.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

A symbol of the Workers' Party of North Korea.

A giant bronze monument to Kim Il-sung and Kim Jong-il is one of the most sacred sites in North Korea.

The silly symbol for an underground protest group is now scattered around the city.

A museum founded to reflect on and remember the human rights abuses under Chilean dictator Augusto Pinochet.

The world's most remote airport.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The largest stone moai on Rapa Nui.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

This Taiwanese promontory is covered in otherworldly hoodoo formations.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

The deepest metro station in the world.

This derelict superstructure was a very important warning system for the Soviet military.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

340-foot statue built to honour the Heroes of the Soviet Union.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

West Africa's largest fishing port honors its artisanal fishing process.

A 19th-century architectural masterpiece with ties to Gustave Eiffel.

This unique religious structure is an architectural gem with arresting ocean views.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.