This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

This Oregon farm is dedicated to teaching people the professional art of tree climbing.

The longest continuous lava tube in Oregon.

This frequently-photographed waterfall takes only a short hike to visit.

A beautiful 62-acre Catholic shrine and botanical garden.

The seamy, underground secrets of Portland's criminal past.

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The most visited, and possibly most controversial, museum in Germany.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A brush maker used his factory to protect blind Jews from the Gestapo.