Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

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

Longest fortress system anywhere in Europe.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

The remains of a sunken military ship wreck visible through clear water.

Where the lovelorn find a home for their sentimental keepsakes.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ethereal glowing blue ocean cave in Croatia.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

A condom-covered Thai restaurant that is more concerned with birth control than food.

Derelict airplane bodies serve as both home and income for three Thai families.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

The wartime prison now features haunting sculpted reenactments of the atrocities that took place there.

Stunning wetlands ablaze with pink lotus flowers.

A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

Have fun at the world's first Buddhist waterslide park.

Thailand's country villages continue the tradition of gong-making, and invite visitors to watch the process.

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