Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

In this relatively flat state the highest point is an honored place.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

The only road through the heart of Glacier National Park.

A majestic hotel that also stands as a historic relic.

This canyon is named for a unique geologic formation where the river vanishes underground near the mouth of the canyon and reappears farther down.

The first declared National Monument in the United States.

Native Americans built this circle of stones, which was used to predict astronomical events.

On the Oregon coast there is a natural hole that seems to be draining the sea.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The fifth-longest natural arch in the world, and the longest outside China.

Take a dip in the world's largest mineral hot springs pool.

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

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

When ecosystems collide in the arid Southwest.

A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

This shrine is an ode to the region's rich Hispanic heritage.