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.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

These ruins of an octagonal stone school that was later used as an A.U.M.P. church exemplify a popular school design from the 1830s.

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

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

A converted hangar displays dozens of helicopters, from a famous 1943 rescue chopper to several autogyros.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

Once on display alongside a giant Gumby, it’s as tall as a nine-story building when fully extended.

A glittering Thai Buddhist temple in suburban Pennsylvania.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

An award-winning children’s garden enchants visitors at the intersection of natural beauty and fairy tales.

Surrounded by industrial sprawl, a small monument marks the site of William Penn's first landing in Pennsylvania.

A museum of anything and everything Stooge.

A completely round house designed for the Atomic Age.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Designed by Horace Trumbauer in 1893, this Gothic-style castle is now a home for academics.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

The final resting place of one of the United States's greatest poets.

Current docking place of the SS United States, the fastest transatlantic ocean liner.