One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

This former shopping outlet is now adorned with beautiful graffiti and murals.

A memorial to the unknown and unheralded men and women of the Cold War military and intelligence services.

Formerly frequented by Hollywood stars and now open for tours.

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

The farthest you can be in the contiguous U.S. from a McDonald's location.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

This giant fiberglass cod celebrates Madison's self-proclaimed status as the U.S. capital of lutefisk.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

A hidden bar inside an ad agency has a deliberately misleading name, so employees can stay late under pretext of paperwork.

Rumored to have been frequented by Vincent van Gogh, it's the only remaining genever producer in the Hague.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

A young state senator's deathbed plea to be buried inside a rock resulted in this unusual grave site.

This airfield is home to a number of retired vintage planes in various states of disrepair.

This nine-story building can be played like an instrument.

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.