A group of college students hauled a desk up a mountain more than 40 years ago. The notebooks inside have become a makeshift time capsule.

A remote trail traverses the little-known Gearhart Mountains of southern Oregon.

A prehistoric rock shelter that's literally in someone's backyard.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

Have a heavy metal Christmas at this bizarre Turkish-American restaurant.

This little-known wall in Southampton stands as one of the most unique and personal monuments to D-Day.

A museum of anything and everything Stooge.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

This Aztec structure remained hidden until the demolition of a supermarket exposed the lost temple.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

The preserved home of the first settler of "the most German town in Brazil."

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

The highest concentration of petroglyph sites in Gold Butte National Monument, plus an improbable early 20th-century dam.

This prehistoric karst cave is situated near a working ranch and historic warm springs.

A hidden gem of a saloon in the middle of a ghost town.

An ill-fated attempt to grow wheat in the sagebrush steppe of northeastern Nevada.

Drive up a paved road into "Nevada's Yosemite" for exquisite views and mountain hiking in an alpine setting.

One of the few slot canyons in New Mexico, this area is fantastic for hiking, camping, and stargazing.

The only international border marker within the United States.

The preserved wheel ruts of El Camino Real de los Tejas, an 18th-century Spanish colonial road across America's Southwest.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

This spectacular track has run continuously since 1882.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.