A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

A beautiful geyser under environmental threat.

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

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

Dig for your own trilobites in this goldmine of invertebrates.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

The remnants of a creative early method of wildfire prevention.

The only road through the heart of Glacier National Park.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The National Park Service’s best-kept secret with views that rival any in D.C.

The first memorial dedicated solely to the Black troops who fought for the Union.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Before Nixon, "watergate" meant canals.

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

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

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

Washington's iconic carousel has a nice piece of Civil Rights history.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Home to items never before seen by the public.

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

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

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