Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

This bone-filled cave got its name after they found 140 bear skeletons inside.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Former hunting lodge of a duke who was an avid collector of impressionist works.

Beautiful views and Roman-style statues on the Italian coast.

Rare karst landscape eroded from a flat seabed.

A historic Montreal market that was the city's agricultural hub for over century.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

This bridge was constructed from the rubble of the infamous Bastille.

This blowhole is supposedly caused by a trapped monster.

Submerged lava formations create incredible waterworks.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Gigantic unfinished stupa and the world's 2nd largest bell.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.