A marvel of Byzantine engineering under the streets of Istanbul.

Vietnam's largest Buddha statue depicts a female sage.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

An extravagant monument to an extravagantly unpopular Emperor.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This beautifully restored fortification kept the city safe for centuries.

This bazaar is one of the oldest in the Arabian world.

A vast, otherworldly collection of Buddhist stupas.

A series of tiny artificial islands rich with produce bob atop the surface of the lake.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

Myanmar's Mount Olympus atop a 2,500-foot volcanic plug.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

One of Ireland's most infamous prisons for rebels including men, women and children.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.