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.

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

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

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

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

Where America's first doomsday cult awaited the end of the world.

A layered tribute to the work of mosaicist Isaiah Zagar.

The 28,000-year-old specimen is remarkably intact.

A surprising, but overlooked example of geology in the middle of the nation’s capital.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

Home to a vast and influential collection of Shakespeareana.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Largest Roman Catholic church in North America.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.