World Records: Buildings

There are world records out there for the strangest things, and the "buildings" category is no exception. Of course, you have the standard "tallest building" and "most square feet," but did you know there's competition for the title of "deepest underwater mailbox"? OK, we know that's not a building, exactly, but come on, we just had to include it. How much do you know about the world's structures?

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