A beautiful geyser under environmental threat.

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

A display of magnificent stained glass windows is the first exhibit of its kind.

Internationally known record store and purveyor of "dusties."

This shop for all your super spy needs hides an educational secret.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The red brick house where the father of rock 'n' roll wrote some of his classic hits.

Less a museum than a bizarre fantasy world created by artists and engineers.

It's said to be one of the most significant collections of contemporary Chinese art in the world.

This extraordinary geological oddity resembles human-made pavement.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

While comics are the main attraction at this megastore, the second floor plays host to an exhibit fit for a museum.

A hotel with a rich Wild West history of miners and bootleggers.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

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

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.