At 1,080 feet, North Korea's Ryugyong Hotel in Pyongyang is one of the tallest unoccupied buildings in the world.

The 105-story "Hotel of Doom," which is also North Korea's tallest building, has never hosted a single guest. Construction began almost 40 years ago, and it is not yet complete the cost of finishing the building is estimated to be around 5% of the country's entire GDP.

Construction on the Ryugyong Hotel began in 1987 but was halted due to economic troubles in North Korea.