The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A beautiful geyser under environmental threat.

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

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The "lovely red Vega" of the legendary record-settling pilot.

Look closely and you’ll notice that the color changes a third of the way up the tower.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The rogue roots are gradually consuming some of the historic marble grave markers.

Step back in time on this preserved 1800s farm.

That bass was as bad a fish as any angler ever knew.

An autonomous oak in Alabama.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.

A bit of retro transportation flair preserved in the world's largest department store.

Avoid gangster interaction while window-shopping.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This tribute to the founding father of the American dictionary originally contained a spelling error.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

This small-town pizzeria won the Hollywood lottery.

137 graves holding New England's earliest residents.

Elvis's own personal tropical hideaway.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.