A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

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

There’s a hidden military meme engraved on the World War II Memorial.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

This beautiful architectural gem was the first waste treatment facility in Boston.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

The two writers famously didn't come to blows over the Oxford comma.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The site of the deadly Triangle Shirtwaist Factory Fire.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

There must be a pun in this haystack somewhere...

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Last church of this militaristic WWII style.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

A school used as a model for public education across the country.

The infamous Boston Mob ran rackets from an office here in the 1970s.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.