A deadly ancient portal to the underworld.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This grand Pakistani mausoleum can only be accessed via an almost 1,000 foot long alleyway.

This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

There are millions of temples in India, but only one prominent temple dedicated to the Hindu creator god.

Eternal flame said to be a Hindu Goddesses fiery tounge.

Nepal's first aviation museum found a logical home in the most unexpected place.

Sacred Indian temple that’s all monkey business.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

Moorish signal station on a stratgic rocky outcrop.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Founded as a refugee camp, now a popular tourist spot.

Crumbling necropolis set high above Fez.

Traditional 11th-century outdoor tannery.