This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

The oldest living tree in Manhattan comes shrouded in sinister legend.

This beloved marketplace mascot poops money and grants good luck.

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

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

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

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

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

The site of the climactic scene from the classic horror film is now a historic landmark.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

At 207 feet, one of the world's longest continuous escalators.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

This unique historical monument features large concrete spheres designed to resemble fallen stars.

There’s a hidden military meme engraved on the World War II Memorial.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

This nine-story building is the oldest standing skyscraper in D.C.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”