The small town of Poulsbo in Washington state is the next best thing to the Kingdom of Norway.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.

Tens of thousands of tiny birds swarm into one school chimney every fall.

Sasqu(w)atch out!

A volcanic fissure over two miles long and up to 70 feet deep.

Massive crater in central Oregon.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

The longest continuous lava tube in Oregon.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The world's longest known cave system.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

Hollowed out cedar log tubs set in an ancient towering forest.

Towering basalt columns, a creation of fire and ice.

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

Enormous lake at the bottom of a unique cave system.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

An enormous, inside-out glass globe built in 1935.

Most-visited and most-photographed slot canyon in the American Southwest.

A huge musical instrument played by the ocean.

The eerie remnants of an ancient forest were hidden under the sand for centuries.