Yale University's home for rare works, including the mysterious Voynich Manuscript.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

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

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

This one-room cabin where the young colonel slept during the French and Indian War.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

A remote horde of architectural treasures fit for Indiana Jones.

Built by the patriotic residents of Boonsboro in a single day.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.