A classic mystery spot complete with spots that are said to make you shrink or grow when you stand on them.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

Only museum dedicated to women pilots, with personal artifacts from Amelia Earhart and other aviatrixes.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

A common entry point to the Griffith Observatory trail holds its own wonders.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A miraculous natural phenomenon known as "the spring that breathes."

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

A beautiful geyser under environmental threat.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

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

This WWII plane died a quiet death, and is now a garden eel playground.

This blowhole is supposedly caused by a trapped monster.

Submerged lava formations create incredible waterworks.

A true treehouse near Hawai'i Volcanoes National Park.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Race through the maze, get your name on the sign.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A tunnel of hardened lava along Maui’s famous Road to Hana.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.