The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

The wooden airship was the largest flying boat ever built.

This charmingly homemade amusement park has been growing for 40 years.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Approximately 50,000 gallons of water gush from these springs, creating the Metolius River.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

A sprawling cave network created by a lone lava tube.

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

A volcanic landmark located on an Ice age lake bed.

Massive crater in central Oregon.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

Atop an active stratovolcano, two lakes separated by a narrow strip of land.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

The longest continuous lava tube in Oregon.

A midcentury ranch house hides a literal treasure trove of unique rocks and minerals.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

According to legend, this rock represents a young girl trapped by an evil ocean spirit.

A massive sea stack famous for its appearance in The Goonies.

Where Nor'easters go to die.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

The magic's in the hole!

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

On the Oregon coast there is a natural hole that seems to be draining the sea.