Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

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

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

The modern birthplace of Irish freedom.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The house where the writer spent his formative years.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

A meditative walk up 353 stairs leads to a majestic white Buddha overlooking Pai.

A mile-long navigable cave adorned with stalactites and stalagmites reaching up to 65 feet tall.

This serene bamboo walkway allows Buddhist monks from remote temples access to the nearby village.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Bizarre dirt trail winds a narrow path above the tree line.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

France's most famous cemetery, with some of its most curious tombs.

This quaint museum in a long-running workshop is dedicated to a fixture in New Orleans lighting.