For centuries, Jeddah’s old town was a major trading port and a point of entry for Hajj pilgrims traveling by sea.

These towering cliffs jut dramatically from the middle of a barren desert.

Whitewashed mosque contains the world's largest carpet.

A 3,000 acre historic oasis and farm in the middle of the UAE's "Green City".

This mysterious abandoned fort looks like something pulled right from Arabian legend.

This beautifully restored fortification kept the city safe for centuries.

A small statue of child Jesus given by Magellan in 1521

This holy site either displays a centuries-old cross or a complete fake.

This statue honors the Philippine warrior who repelled a foreign invader and prevented Ferdinand Magellan from circumnavigating the globe.

This fountain was once heralded as the largest in the world.

A dinosaur-laden walking trail outside Singapore's Changi Airport.

These pastel-colored homes were built when the island of Macau was a Portuguese colony.

A remnant of Korea's colonial past lies forgotten in a hip neighborhood in Seoul.

Secret North Korean passage discovered below the world's most dangerous border.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Five miles of underground river link lake to ocean.

This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

This ambiguous pig shrine is actually a monument to a beloved queen.

The oldest Hindu temple complex in Nepal serves as the seat of Nepal’s national deity, Lord Pashupatinath.

Sacred Buddhist home of some spiritual monkeys.

This historic square in Nepal is home to temples dating back to the third century.