Ride the subways of yesteryear.

Sniff the Titan Arum's rotting flesh.

Climb inside an iron crystal magnified 165 billion times its normal size.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A little sculpture with a large wardrobe.

A modern zoetrope on the New York City subway.

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

Copenhagen's celebrated theme park and gardens.

One of Ireland's most infamous prisons for rebels including men, women and children.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

Fortified homes of highland warriors that are still in use today.

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

Giant stone letters dedicated to the founder of Armenia's alphabet.

Unusual building appears to be haphazardly built from randomly piled bricks.

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.