Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

Its diverse collection of computers and technology spans the ages.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

A small museum along the Susquehanna River is home to a rich collection of Native American artifacts.

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

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

An unusual and eclectic collection of local historical memorabilia.

This might just be the TARDIS of bookstores.

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.

One of the oldest surviving Swedish-American homes in the United States.

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

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

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

A scenic fort on the harbor protected Philadelphia from an attack that never came.