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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

This Chinese-style quartz sundial was saved in its final hour.

This sidewalk tribute honors Colorado's great culinary creation.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

Colorado's only true geyser is hidden within the San Juan National Forest.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

America's first federal monument.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The first permanent memorial to a unique secret weapon of World War II.

An unassuming rod in the Netherlands was once the old standard unit of length for the entire Dutch empire.