This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

Once one of the largest producers of pig iron in the world.

One person's lost luggage is another person's treasure.

Home to the deepest rift anywhere on Earth.

Mining caused an asbestos emergency in this small town.

A giant milk bottle from the 1930s beckons drivers to this diner.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

The largest wooden building in the world now houses a fascinating collection of aircraft.

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

Home of Howard Hughes' Spruce Goose.

This natural marble cave is one of only five national monuments in Oregon.

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

A vertically floating hemlock controls the waves and weather at Crater Lake.

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.

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

A stunning landscape of bunkers that once stored chemical weapons.

The decorations were inspired by an unlikely missing treasure.

The former home of the "Mother of Father's Day."

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.