Monkeys lounge around at this 13th century temple.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

Sculpture that doubles as a time capsule so that life can survive radiation outside Chernobyl.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

Marvel at the excessive luxury of the ousted Ukrainian president's former estate.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

An Art Nouveau building covered in animal gargoyles and grotesques.

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

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

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

The largest catacomb system in the world.

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.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

Iceland's tribute to its thankless civil servants.