The ruins of a town wiped out by the second-largest earthquake in recorded history.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

The king of U.S. high points towers over every other peak on the continent.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

Only known mainland rookery of the threatened Stellar sea lion.

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

100-year-old shipwreck you can walk up to at low tide.

This graveyard is the eternal home of many brave pioneers who settled the Great Northwest.

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

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

A stunning landscape of bunkers that once stored chemical weapons.

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

Two massive rock outcroppings on the Oregon coastline.

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

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

Home of Howard Hughes' Spruce Goose.

The wooden airship was the largest flying boat ever built.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A heavenly experience, right here on Terra Firma.