A lush green oasis in the middle of Chicago.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

At this research institute, the chile is king.

Setting this massive marionette aflame rids Santa Fe of doom and gloom for another year.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Toss a Frisbee through the ruins of this Colorado gold mining town.

This interpretive path lets you get up close and personal with dinosaur bones.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

A recreation of an Old West apothecary full of curios.

See six states, pickled freaks, rocks, and antiques.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

An early-19th-century hotel with a past that is steeped in the Civil War.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

Said to be one of Sweden's most haunted places, this vicarage once even attracted a ghost-busting priest.