If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Scary metal statues adorn some of the signature buildings of Burlington, Vermont.

A monument marks the beginning of the longest north-south road in the United States.

This museum on a college campus pays tribute to the Arctic and to two explorer alumni.

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

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Treehouse motel and treehouse-building school.

A tourist attraction founded around a slumping cabin.

Site of the greatest known waterfall that ever existed.

Two massive rock outcroppings on the Oregon coastline.

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

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

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

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

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

Keeping Ballard's heritage alive with delicious, lightly battered Alaskan wild cod.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Granting the right of way to ships over surface traffic since 1917.

A wall of chewing gum moonlights as collective art.

A walk through the historic city center, under the streets of Seattle.