The tunnel under the Capitol Building where Congress takes out its trash.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

Corn-inthian columns with a uniquely American take on neoclassical architecture.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

During Prohibition, the U.S. Congress had an "official" bootlegger, with his own Capitol Hill office.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

The wooden airship was the largest flying boat ever built.

A memorial for the mustachioed record-setting runner.

The world's last remaining store of its kind.

The original span of a high bridge across the deep Crooked River Gorge has been preserved for pedestrian use.

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

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.

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

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

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

Fifty years after a “blast blasted blubber beyond all believable bounds,” this idyllic natural area commemorates the carnage.

A 36-ton remnant of the last Ice Age now resides amid picturesque vineyards.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

Only known mainland rookery of the threatened Stellar sea lion.

There's something big lurking beneath the surface of this tiny Oregon park.

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

A superb spot to appreciate the traditional boats of the Indian Ocean.