Eccentric concrete mansion and museum designed and built by hand from the inside out.

In which a local geological marvel becomes a quaint roadside attraction.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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

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

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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

These medicine cabinet staples are part of the museum's collection of everyday objects.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

An abandoned church gets a second life as a massive beer hall and event space.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

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

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

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

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.