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

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A close look at the church's walls reveals pieces of Mexico's history.

It's believed this golden brick is part of the legendary lost Aztec treasure.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.

The only road through the heart of Glacier National Park.

Site of the greatest known waterfall that ever existed.

Every drop of water in this 27-mile long reservoir was pumped up from the Columbia River using power from Grand Coulee Dam.

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

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

Home to the only outdoor municipal elevator in the United States.

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 collection of colorful dinosaurs hidden in an actual rainforest.

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

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

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

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.