An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

A domino effect created with Britain’s iconic telephone boxes.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

This last stalwart of the now-forgotten feminist restaurant movement served food in an activist atmosphere since 1977.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

Though the original building has been demolished, these massive bronze doors were saved.

For 20 years, local pumpkins have met their fate on the iron fence surrounding this Cobble Hill home.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

A giant knight, sex education, date shakes, and Jesus coexist happily in this Coachella Valley desert oasis.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Three prestigious academic collections come together to create a world-class natural history museum.

Impossibly life-like natural history models created out of glass by a father and son.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

A giant Troll lurks under one of Seattle's oldest bridges.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The famous artist couple lived and worked here, in two different houses connected by a bridge.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

An incredible collection of Mesoamerican art assembled by one of Mexico's great artists.

The stoutest tree in the world.