Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

America's largest man-made forest was planted in an effort to bring back the past.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

Roaming bison and a spectacular view at the highest point in Nebraska.

A long and winding trail through history led to the current iteration of this mountaintop tower.

Colorado's only active volcano last erupted around 4,000 years ago.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

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

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

Two creeks flow out of either end of this canyon in opposite directions.

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

A river runs through this remote valley in a very unexpected way.

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

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This towering wooden Sasquatch was carved with a chainsaw.

This 4,000-acre restored grassland in northern Illinois is home to a range of native flora and fauna, from clovers to plovers to a herd of bison.

In addition to fishing and camping, this spot in Nebraska’s Sandhills is one of the world’s darkest places.