Pittsburgh's literal underground railroad.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The largest known Ancient Egyptian obelisk.

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

Giant disc-shaped gate took 20 men to close off this city in Madagascar.

Ancient Manuscripts showcase the civilization of West Africans during the Middle Ages.

Annual rush for a sacred desert lake's fish stock.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Now containing the bones of the actual conquistador, instead of someone else.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The Uros people live on floating reed islands in lake Titicaca.

A tunnel of hardened lava along Maui’s famous Road to Hana.

A Hawaiian stairway to heaven—that you can't climb.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

Watch the newest land on the planet form before your eyes.

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.