Acres of natural wonders left behind by a socialite-turned-gardener.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A real-life replica of a home from Hayao Miyazaki's beloved movie "My Neighbor Totoro."

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

These colossal desert barcodes have been fine-tuning spy satellites for decades.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

This tree was extinct for a thousand years before sprouting again from a 2,000-year-old seed.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

This house's itty bitty size means no humans allowed.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

The world's tallest bridge is also possibly the most elegant.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

A fashion designer's dazzling world of Japanese collectibles is hidden in a warehouse downtown.

This landmark is a central figure in the Nez Perce origin story.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

This cave system allegedly holds the "metallic library" of a lost ancient civilization.