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

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

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

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

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

An outlandish shoe shaped house built by an eccentric millionaire.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

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

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

Bizarre Cavern.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One of the only memorials dedicated to journalists who died in combat.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

A Civil War Museum with some notable medical antiques.

This free, take-a-book shop seems like a trick but isn't.

A hidden alley in urban Baltimore is a haven for graffiti artists.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Once America's tallest structure, now a Baltimore landmark.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

This abandoned sea fort has become an accidental bird sanctuary.

A museum dedicated to exhibiting remarkable outsider art.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.