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

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

The seat of Buffalo government is a gorgeous Art Deco palace.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

Man-made geyser that rises to the exact height of the Gateway Arch.

St. Augustine's record-setting narrow street was designed to protect against pirates.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

"X" marks the spot of an echo chamber in the middle of a plaza.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

An Irish Memorial commemorating those who perished due to potato blight.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

The site of Paul Revere's historic two lantern warning.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A building so large that it has its own weather.

This kitschy tavern is also home to rare early editions of "Treasure Island."

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.