An architect's childhood fantasy treehouse made real.

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

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.

The first declared National Monument in the United States.

The final resting spot of the Colorado Transportation Department's beloved unofficial mascot.

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

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

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

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

"All Mountains - All The Time."

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

A downtown park built on top of unclaimed graves.

This iconic science fiction house still looks like something from the future.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

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

Travel through the wholesome amusements of yesteryear at this charming miniature village.

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

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

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.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

The clock that sets them all.

The largest source of fossilized insects anywhere.