This 18th-century sundial was designed to calculate the date of Easter each year.

This gallery is home to everything from antiques, to ancient tribal masks.

A downtown park built on top of unclaimed graves.

A tiny town’s tiny museum with some gigantic residents.

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

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

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

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

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

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

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

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

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

A mysterious "wedding cake" castle in the middle of the urban desert.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

A hidden grotto on the grounds of the Kane County Government Center.

Abandoned anti-ballistic missile base.

The quiet canyon has a tumultuous history involving a doomsday cult.