An ancient Egyptian temple in the middle of Madrid, Spain.

A small store filled with animal skulls and other curiosities.

This iconic science fiction house still looks like something from the future.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

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

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

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

A hot dog stand where the heads are just as hot as the dogs.

A Bibliophile's Dream.

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

A multiversal transit station located right below a highway interchange.

The eerie ruins of a remote abandoned hamlet said to be founded by the survivors of a shipwreck.

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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

A haunting tribute to pioneering photographer Clover Adams.

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

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

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

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 oldest surviving botanic garden in the United States.

World's first "penitentiary," meant to be humane, drove men insane.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A museum in the former home of Marxist revolutionary Leon Trotsky.