One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

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.

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

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

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This overlooked courtyard and museum celebrate Benjamin Franklin's life and achievements.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

The land is home to swimming ponies and a legendary 18th-century treasure.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

This relic is one of the last survivors of the earliest eras of the American railroad.

A tribute to two brothers' artistic endeavors.