One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Ruins of a once-prized railroad station in New York.

Rochester's signature culinary delicacy.

An old church full of restored Catholic statues is a makeup artist's labor of love.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The largest collection of Frazetta originals in the world.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

One of Philadelphia's largest murals resides hidden under this bridge.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

This icon of the Atomic Age now lays dormant.

A quirky collection of outsider art made from automobile parts.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Dr Barnes' $25 billion private collection of art and arboretum.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This cemetery is home to numerous granite headstones that are works of art unto themselves.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

Oldest synagogue in the United States.

The oldest still-operating tavern in the United States was once owned by a pirate.

Mysterious stone tower featured in many alternative histories of the New World.

Unicorns, elephants, and bears, oh my!