Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Learn about the history and craftsmanship of carousels inside this museum located in a former post office.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

The world's longest known cave system.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The angel of death appears to weep black tears at this grave marker.

Remnants of a storybook amusement park hidden behind a strip mall.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

A historic cemetery filled with quirky faux wood art and unique tombstones.

A relic of FDR's brief foray into utopian urban planning.

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

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.

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

A Civil War Museum with some notable medical antiques.

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

This abandoned Victorian-style house was built in 1884.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This abandoned sea fort has become an accidental bird sanctuary.

Ship skeletons haunt Baltimore's waterways.