These lush botanical gardens employ the most purrfect pest control force.

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

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

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

A local prank turned town icon.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

The oldest farmer's market in America is so ancient it was approved by the King of England.

The first American department store, and home to the largest operating musical instrument in the world.

A failed piece of Orientalism has become the proud symbol of a community.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.