The fairy tale castle of the "fairy-tale king."

The only remaining sod house Oklahoma built by a homesteader in 1894.

This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

Executions were once held near this beautiful 18th-century fountain.

Marie Antoinette and Napoleon Bonaparte were fans of this 200-year-old French chocolatier.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The first green space constructed on an elevated viaduct.

This enormous gold Buddha statue was hidden inside a stucco decoy for centuries.

One of Ayutthaya’s most iconic locations is a mysterious, hauntingly surreal miracle.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

A palace destined to never house a king.

A former French military respite turned jungle tourism hotspot.

A non-profit that uses the impressive smelling abilities of African Pouched Rats to find and clear unexploded land mines.

Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.

Khmer Rouge's high security prison.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

One of the biggest markets in Asia, under one of the continent's largest domes.

5,000 skulls in memorial to those killed by the Khmer Rouge.

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

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

Thailand's tribute to the original "Siamese Twins" Chang and Eng, in the town the famous pair was born in.

The bank's whimsical shape was inspired by a child’s toy.

A shrine built to combat the bad karma of a commercial venture.

This bridge made famous in a novel and on-screen wasn't actually built over the river Kwai.