#21 A breathtaking in-person look at Leonardo da Vinci’s The Last Supper:

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#22 Step inside the Wienermobile—yes, this is what it actually looks like:

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#23 Venice without water? This is what a fully drained canal looks like:

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#24 A rarely seen view of the Statue of Liberty from behind:

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#25 Disney World's clever trick—how the Haunted Mansion is hidden in plain sight:

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#26 This is what a completely empty CVS store looks like:

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#27 16 stories beneath New York City, this is what you'll find:

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#28 Tokyo has four miles of tunnels 72 feet underground to prevent flooding—this system is massive:

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#29 A breathtaking sunset…on Mars:

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#30 Did you know cooling towers have an open bottom? Here’s proof:

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#31 The US-Canada border as seen in Idaho:

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#32 This monument to the doomed Donner Party shows just how deep the snow was during their tragic journey:

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#33 The Golden Gate Bridge under construction—before it became an icon:

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#34 A rare glimpse inside the White House during its reconstruction in the late 1940s:

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#35 A stunning aerial view of the pyramids of Giza from a plane:

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#36 Inside Big Ben—this is what’s behind one of its clock faces:

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#37 Central Park in New York City as it looked during the Great Depression:

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#38 A rare plane window view of Antarctica:

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#39 You’ve seen Grant Wood’s American Gothic…

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#40 …but this is what the inside of the actual house in the painting looks like:

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