The maximum security facility was once thought to have "the bloodiest 47 acres in America."

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The statue of the famous elephant who was the original source of the word "jumbo".

A former Canadian Pacific Railway station turned liquor store, the first and only station in Canada visited by British royalty.

Willy Wonka would love this weird half-a-home.

Profile of a sleeping person four kilometers long in 250-meter-high cliffs.

A multimedia experience that chronicles the atrocities of racism.

The site of Paul Revere's historic two lantern warning.

Dedicated to nine marines from Massachusetts who perished during the Beirut bombings.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Millions of numbers carved in glass represent the tattoos forced upon victims.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

This observation tower is a longstanding, 1960s landmark in the Thousand Islands region of Canada.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

The artwork commemorates the many ways 20th-century people perished while on the clock.

These markers are used to document elevation changes around the famed dam.

The seat of the lost Ryukyu Kingdom has survived numerous fires and wars over the centuries.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Its columns were all carved from the same white oak tree.

Believed to be the birthplace of the United States Marine Corps.

Yo, Adrian!

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

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