This lake in the Cascades lives up to its name, disappearing down a hole every spring.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

These natural hot springs form four-tiered soaking pools with temperatures ranging from 85 to 115 degrees Fahrenheit.

This square in downtown Eugene is dedicated to the novelist and countercultural figure Ken Kesey.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

This frequently-photographed waterfall takes only a short hike to visit.

A cosmic pit stop just beyond the notorious Area 51.

A remote desert monument marks where a priest and explorer entered what later became Arizona.

Explore a wealth of fossils in one of the most prolific dig sites in North America.

This high-desert oasis spotlights some of Colorado’s most sacred native plants.

This enormous fiberglass cow near Death Valley National Park once graced a casino roof in Las Vegas.

Improbably, the largest wildlife refuge in the conterminous 48 states sits just northwest of Las Vegas, Nevada.

The colonial home of Paul Revere during the American Revolution.

One of America's oldest continuously operating hotels offers a blend of rich history and historic architecture in the heart of Annapolis.

A remarkably well-preserved one room schoolhouse that dates back to 1876.

Engraved in stone here are the signatures of everyone who signed the Declaration of Independence.

John Wayne, Ronald Reagan, and other Hollywood actors have resided in this picturesque Route 66 hotel.

Larger-than-life cut-out murals of James Dean and Elizabeth Taylor, dedicated to their 1956 film ‘Giant.’

The house where Lincoln drafted the Emancipation Proclamation.

Commercial aircraft storage facility, where you can see a TWA 747.

A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.

Dozens of elaborate works of automotive art have been preserved at this Arizona museum.

One of America's oldest stadiums was also the site of one of the most brutal anti-labor acts in American history.