Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The site of one of history's most indelible and horrific tragedies.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Fantastic collection celebrating the final send-off.

Megachurch turned Catholic church comprised of 10,000 glass panes.

Only known mainland rookery of the threatened Stellar sea lion.

A sculpture for the sun and stars, created by Nancy Holt.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

A humid oasis combines recreation with exploration in a unique underwater cavern.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

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

Walk over a 150 year old manhole.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Ingenious bakery opens up the first Cupcake ATM at their flagship location in Beverly Hills.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

An extraordinary mixture of natural beauty and man-made phenomena.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.