With some 500,000 books across five buildings, this bookstore is a reader's paradise.

A normal, unassuming pedestrian overpass has been the demise of many, many trucks.

A beautiful final resting place for some of the noteworthy deceased.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

A tribute to the hard-working men and women of Grumman, who crafted F-14 fighter jets.

This elaborate towering structure was once famed for its revolutionary height.

A restored Shell gas station from 1937 that includes a tow truck, the original gas pumps, and the original office.

Home to items never before seen by the public.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

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.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

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

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

A sharp sculpture made of thousands of pieces of jagged glass.

Abandoned Coast Artillery fort now serves as a graffiti canvas and sightseeing vantage point.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The final resting place of the famous Rhode Island lighthouse keeper who heroically saved dozens of people from drowning.

Oldest synagogue in the United States.

The second oldest Jewish graveyard in the U.S. is tiny, with connections to George Washington and Henry Wadsworth Longfellow.

Mysterious stone tower featured in many alternative histories of the New World.

Dedicated to the explorer who opened Japan to the West.