A Mysterious Masonic tomb in San Luis Obispo.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

One of the ghostly stops along Route 66.

The site of murders and Satanic cult gatherings.

The ghost town that ended up on Ebay.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The ghostly remains of an accidental sea.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The longest living non-clonal organisms on Earth.

Storage units with a wartime past.

Roaming bison and a spectacular view at the highest point in Nebraska.

An experimental, automotive replica of Stonehenge.

This erect, phallic geological spire wasn't always named so domestically.

A sculpture of a flying hawk made from colorful car doors.

Albuquerque found the perfect use for tumbleweeds at Christmastime.

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

A burnt-out motel with priceless Native American artwork in the basement, redeveloped into apartments.