Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

North Korea's massive "hotel of doom."

Pyongyang’s Arch of Triumph is the second tallest triumphal arch in the world.

One of the largest public squares in the world, named after the former DPRK supreme leader.

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

A symbol of the Workers' Party of North Korea.

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

Captured in 1968, the Cold War spy ship is the only U.S. Navy vessel being held by a foreign government.

A vast museum devoted to North Korea's victories against its imperialist enemies.

This North Korean pegasus statue was built as a symbol of the speed and perseverance of North Korean workers.

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

This Himalayan airport provides one of the most difficult landings in the world.

The largest and, arguably, most scenic fortress in Bhutan.

This giant Buddha statue has 125,000 smaller Buddhas hidden inside it.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Where thousands of slaves passed through the "Door of No Return."

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

An enormous public square and parade ground built to celebrate Ghana's independence.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This charming candle shop has been in business since 1789.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

One of the smallest bookstores on the planet.

The best place in the world to buy tinned fish.