The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

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

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

These pretty kitties killed and ate as many as 135 railway workers.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Largest Roman Catholic church in North America.

Hundreds of protractors affixed to surfaces all over the city.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Soaring over the Niagara Whirlpool since 1916.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The only surviving prototype for Buckminster Fuller's house of the future.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

A grandiose title could not save this mercantile community from obscurity.