An astounding collection of medical specimens, including bits of President Lincoln.

A museum dedicated to exhibiting remarkable outsider art.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

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

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

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

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

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

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

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Step into a pastel time capsule where candy is truly dandy.

The first American axe throwing club.

Alexander Hamilton’s creation caused quite a bit of controversy.

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

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

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

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

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

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

Dr Barnes' $25 billion private collection of art and arboretum.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.