In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

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

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

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

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

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

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.

Victorian "Fancy Craft" Hair Wreaths and Relics.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

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

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

A downtown park built on top of unclaimed graves.

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

The highest bridge in America was built for an almost unnervingly small amount of money.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.