This unassuming home was once “grand central station” for the Underground Railroad.

A miniature world of concrete and stone in Springfield, Ohio.

Inside this wonderland of weird, visitors are treated to a collection ranging from skeletons to haunted artifacts.

This bridge uses an inverted bowstring truss and is believed to be the only of its kind in the United States.

The largest ancient burial mound in Ohio.

Recycled junk and fishing buoys litter the yard and facade of this bait shop cum art project.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.

This "living building" on Georgia Tech's campus is home to a blueberry orchard, honeybees, and more than 900 solar panels.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

Though his role as the inventor of baseball may be up for debate, fans still festoon Doubleday's grave with baseballs.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

This former monument to an invented Iraqi victory was turned into a military camp during the subsequent invasion.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Join in a Seance at the Swedenborgian Church.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

FDR's Art Deco hospital tower was hopelessly inefficient.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.