The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

This unassuming city park is home to three different types of Native American mounds.

This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."

The Cape of Good Hope is not quite as low as you can go on the African continent, but it's still geographically significant.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

A century-old magnolia tree is the only living landmark tree in New York City.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

An artist's cute bronze subway sculptures belie his violent artistic past.

The only subway station in the city that still makes use of gap fillers.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

Where the Monitor was launched and ushered in the age of the "ironclads."

“Wagon Jobber" turned smokehouse magnate's family-owned business is still going strong 100 years later.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

This statue honors the author's groundbreaking family story.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.