The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

A Roman-style column in Oregon hides a spiral staircase inside.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

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

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Formerly secret, precariously perched boulders.

A collection of colorful dinosaurs hidden in an actual rainforest.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Only known mainland rookery of the threatened Stellar sea lion.

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

Oregon's unexpected high desert, displaying layers of time in a colorful show.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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