The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

The world's longest known cave system.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

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

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.