These crumbling foundations are all that remain of the once-stately 1840s manor that gave the town of Bradenton its name.

An eclectic treasure trove of maritime marvels.

These items are all that remain from the room used by the author during his second tour of the U.S.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

An enormous, inside-out glass globe built in 1935.

A geological mystery on Camelback Mountain.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

A time capsule of Floridian history fights to survive on the banks of Chokoloskee Bay.

The smallest post office in the United States is no bigger than a broom closet.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

The most accurate timepiece in the world.

Decades before the scandal, this staircase on the river was a literal "water gate."

There's a crumbling old mansion inside the Smithsonian National Zoo.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

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

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The national park was once a plantation estate.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.