A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The historic home of an educator, abolitionist, activist, and poet.

A mummy and sarcophagus are part of the many wonders in this library's collection.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

An abandoned Yorkshire castle that is hidden in plain sight.

In Houston's airport, a cow is properly equipped to jump over the moon.

The crumbling remains of a once-grand building.

A museum that houses the world's largest collection of ventriloquism dummies.

A limb from Indiana's largest sycamore tree on record.

The world's largest anatomically accurate brain sculpture.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

The world's longest known cave system.

The only freestanding table rock formation east of the Mississippi.

One man's vision and a labor of love of many.

The longest navigable underground river in the United States is home to countless blind and albino animals.

You thought Santa Claus didn't exist, but it turns out you were wrong.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

The U.S. Air Force has an anti-satellite laser weapon.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

The extensive collection of an amateur naturalist.

A replica that won't float away.