A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

There are eight natural springs around town, each with a slightly different taste.

This super steep hike ascends 2,000 feet in less than a mile.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

The largest source of fossilized insects anywhere.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

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

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

This eclectic collection documents the wild legacies of "America's Wickedest Street."

The start of the group that straightened the teeth of a nation.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.