This dry lake bed contains the oldest known petroglyphs in North America.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

Two craters, which probably erupted within the last 1,500 years and are now filled by alkaline lakes, represent Nevada's youngest known volcanic activity.

A quirky old tree covered in tokens, cans, and bottles of wishes.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A sprawling museum located on the former site of the Orphan Girl Mine.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A smoke stack so large, the Washington Monument could fit inside!

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

This playground sculpture of an icon from the past is dedicated to the children of the future.

A classic carnival ride that was carved to be untouchable.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

A small, fascinating fire museum hidden in plain sight in an administrative building.

This rare, carefully curated collection showcases the history of neon inside a grandiose Elks lodge.

The longest continuous lava tube in Oregon.

Massive crater in central Oregon.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

This 22-acre botanical garden is home to the largest collection of rhododendrons in the world.

Old submarine parts have been converted into faux whale fins.

A wall of chewing gum moonlights as collective art.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

Portlandia is the second-largest copper repoussé statue in the United States.

Their motto is, "We've been bonkers for hats even longer than you have!"