This ancient Hawaiian henge may have been an early star chart.

This World War II-era bunker is now packed with posters and props from movies and TV shows filmed nearby.

A Hawaiian stairway to heaven—that you can't climb.

What remains of the summer palace of King Kamehameha III.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

A unique set of caves that spits waves back out into the ocean.

This mouldering abandoned mental hospital was once a center for progressive healing.

A shrine to a skeleton saint in the city of angels.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

World's largest collection of serial killer artwork and other macabre exhibits.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

Private collection of art inspired by cabinets of curiosity.

A technicolor place of worship for Elevationists.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.