A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Once a dumping spot, now a park with a kayak launch.

Ornate "Renaissance Revival" style building.

Church featuring "high Victorian gothic" architecture.

The only surviving sidewalk clock in Brooklyn.

Historic Greenpoint theater, turned roller disco, now housing a chain pharmacy store.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

The historic home still shows the scars from a little run-in with the British in 1813.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

The land is home to swimming ponies and a legendary 18th-century treasure.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

The ruins of an early-18th-century complex that could once house up to 12,000 horses.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

The Liverpool street made famous by the Beatles is real.

The oldest known university in the world is in Fez, Morocco.

A layered tribute to the work of mosaicist Isaiah Zagar.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

A museum dedicated to Nantucket's legacy as the "graveyard of the Atlantic."

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

Memorial to the 137 lives lost on a ship fire, the whole hulk of which washed up on the Asbury Park shore.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.