This rickety old shed hides a trove of secondhand literary treasures.

The artist behind this historical depiction of transportation remains a mystery.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

A home covered with elaborate mosaic and other pieces of art.

This depiction of the earth mother welcomes new life into Aurora Highlands.

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

A pair of gargoyles peer into unsuspecting passengers at Denver’s conspiracy-packed airport.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

After being lost for nearly a century, this historic bell finally returned home after its mysterious theft.

Pieces of a stone giant are embedded in the earth of this Colorado park's playground.

Built in 1981 in collaboration with Andy Warhol, this giant piece of pop art stands on the campus of Colorado State University.

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

A unique auditory experience right on the sidewalk.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

A mural and a few historical markers commemorate Denver's once-thriving Chinatown, which was obliterated in a racist riot.

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

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

These murals from the 1920s beautifully depict America’s industrial age.

This sidewalk tribute honors Colorado's great culinary creation.

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

A downtown park built on top of unclaimed graves.

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

A small store filled with animal skulls and other curiosities.

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