At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

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

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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

When ecosystems collide in the arid Southwest.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

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

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

The magic's in the hole!

A walk through the historic city center, under the streets of Seattle.

A museum dedicated to the history and exploration of both popular music and science fiction.

These disused steel furnaces are now haunting ruins that may one day be a national park.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Hundreds of protractors affixed to surfaces all over the city.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.