Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

The record holder for the world’s largest peach.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Friction between grains of sand cause a curious "singing" sound.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This museum offers an actual time machine back through Colorado's past.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

100 massive sculptures in the Hudson River Valley.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

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

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Underground tunnels once home to crime are now back open to the public.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

A derelict bit of transportation infrastructure hidden in the woods.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This abandoned sea fort has become an accidental bird sanctuary.