A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Breathtaking and huge 430 year old maps of Italy.

An ancient octagonal weather station named for the eight Greek gods of wind.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Giant marble phalluses on the sacred island of antiquity.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

The Habsburgs' royal collections of art and wonders.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

After Christopher Columbus died, his son built a fancy house to rule from.

A Korean village where times stands still.

These tiny statues form a terracotta army from China's Han dynasty.

The most famous location in China was home to whole dynasties worth of imperial rulers.

These strange piles of magnetized volcanic ash travel across the desert about 50 feet per year.

Human ancestor’s 3.6 million year-old footprints.

The original goat tower, the one that started it all.