A reproduction of earth's many biomes.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A sharp bend in a dramatic river canyon cut through red rocks.

You might want to bring a rain jacket to this travertine triple waterfall.

Explore a wealth of fossils in one of the most prolific dig sites in North America.

Once owned by the largest employer in Colorado, these ovens have been abandoned for over a century.

This Rocky Mountain mansion was the luxurious home of the authoritarian leader of a company town.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

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

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

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

A little-known hot spring haven right below the highway.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A downtown park built on top of unclaimed graves.

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

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

A 400-square foot model of historic Quebec is the playing field for a state of the art light and sound show.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.