A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

Rich red almandine gemstones are waiting inside the volcanic rock strewn across this eastern Nevada hillside.

A modern frieze of ancient Grecian mythological figures playing a national pastime.

This iconic fortress was once the crown jewel of Haiti's national defense.

The royal seat of Henri Christophe, a formerly enslaved man who became Haiti's only king.

The exterior of this home was used for the hit television show, The Brady Bunch.

A famous pilgrimage site that remains hidden in the midst of a city.

A miniature of a lighthouse acts as a beacon for what transpires inside this location.

This Neolithic passage tomb forms part of a World Heritage Site.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

This former 17th-century church now houses a university's public library along with several mural masterworks.

Scotland's first Masonic lodge may also be the oldest in the world.

These ancient ruins hide in plain sight next to a dessert shop.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

This 15th-century structure had a long, tortuous journey to its current location.

This popular square's history as the former site of a church is right beneath your feet.

These wooden pipes were crucial to providing water to Medieval Edinburgh.

The location of a citizen uprising that led to a gruesome act of mob justice.

This medieval church is not only notable for its architecture, but also its connection with LGBTQ+ history.

A shrine to the missionary who first brought Islam to China.

A fantastic assortment of China's finest and most disturbing wares.