This millstone commemorates a gruesome tale that may have been the source of the city's name.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A terrific purveyor of natural history objects and curios.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

Final resting place of the immigrant who brought artificial seltzer water to America.

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

Before online banking and smartphone apps, there was "commuter banking" in the subway in Downtown Brooklyn.

Love is in the air along the small street in Brooklyn.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

This metal eagle one of the final remnants of a newspaper that wanted to keep Brooklyn to Brooklyn.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

It was once the base for a series of domestic terror attacks.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

A much-maligned monument to teetotalism.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

This unassuming passageway played a key role in one of the most important events in U.S. history.

The house where John Wilkes Booth conspired with his co-conspirators.

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