Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Ride the subways of yesteryear.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

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

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

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

A priceless collection of the Nation's cryptologic history.

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

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

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

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

Historic barracks utilized during both the Revolutionary War and the Civil War.

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations