This one-room schoolhouse in rural Arkansas dates to the 1920s, but looks like it could be the 1820s.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

Town not known for anything except its strange name.

An extravagant western hotel where every floor is the "ground floor."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

Thousands of small machines line the shelves of this personal collection which definitely delivers on its name.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

A reproduction of earth's many biomes.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Some of the Old West's most notorious outlaws frequented this mining town.

A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

Steep canyon walls hide a forested oasis in the West Texas desert.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

The birthplace of the first author to win the Pulitzer Prize in fiction and poetry.

The first full-scale tunnel built in America is short but scenic.

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

This tomb was fashioned with a sliding window for a grieving mother who struggled with her daughter's death.

This historic oak tree has been around for over 300 years and might last for 300 more so long as it doesn't fall apart first.