Low tide reveals 8,000-year-old rock carvings in Southern Alaska.

A historic freight system that found the true gold rush is in tourism.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The personal charnel house of Anton Bruckner.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Artfully arranged bones of 5,800 Austrians.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

This former insane asylum now holds a pathological anatomy museum.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

One of 200 religious buildings recognized as a “culture monument.” 

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.