Two massive rock outcroppings on the Oregon coastline.

Only known mainland rookery of the threatened Stellar sea lion.

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

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

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

The artwork commemorates the many ways 20th-century people perished while on the clock.

A fence constructed completely of skis on Monroe Street.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A historic arena where the Beatles played their first concert in the U.S.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

Largest Roman Catholic church in North America.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

The Hudson River School comes alive at this palatial estate.

This massive roadside mascot was the first version of the giant to illustrate his butt.

'Cause the fence start shaking, the earth was quaking.

A rough granite monument marks the spot where Europeans first caught sight of the San Francisco Bay.