This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

The oldest surviving presidential residence in the United States.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

This Pennsylvania structure, the oldest building in Gettysburg, was once a stop on the Underground Railroad.

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

A homage to the King at the hotel where he revived his career.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

An exotic wildlife habitat right off The Strip.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

Step back in time on this preserved 1800s farm.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.