This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

All of Chicago's wood-paved streets are long gone but two alleys remain.

These abandoned grain silos and tunnels are an urban exploration dream.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This only museum in the world dedicated solely to mushrooms.

A small island dotted with old, historic Finnish buildings.

A subterranean house of worship carved right out of the bedrock.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

This airport currywurst stand is made out of retro airplane parts.

This beautiful 19th-century temple stands atop the ruins of its predecessor.