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

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

The oldest surviving botanic garden in the United States.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

The oldest surviving presidential residence in the United States.

The Ryerss mansion in Burholme Park now houses a community library and a museum filled with a trove of oddities from around the world.

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

Among the may artifacts on display is a clock made of 50,000 individual pieces of wood.

The smallest and oldest covered bridge in Delaware.

The tombstone of the founder of the lost town of Ogletown is now stuck inside a traffic median.

Once used as a deterrent to drinking alcohol.

The world-record holder for the longest bridge stretching continuously over water.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

A failed piece of Orientalism has become the proud symbol of a community.

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

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

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

A rural colonial settlement that contains the remains of a store and cooper.