This memorial in the Adirondack wilderness honors the accidental death of a Scottish entrepreneur.

A hamlet full of permanent Christmas spirit holds one of the earliest theme parks in the United States.

It wouldn't be long after purchasing this farm, Brown would lead his siege on Harper's Ferry.

Dozens of houses in the Adirondack Mountains are reminders of a literal "cottage industry" to cure people of a deadly disease.

A former infectious disease laboratory chronicles how tuberculosis shaped a village nestled in the Adirondacks.

Home to items never before seen by the public.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

A modernist landscape of water and sci-fi concrete.

Recently restored menagerie of Victorian-era beasts.

The private clubhouse for the members of the Academy of Magical Arts.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.