For 10 points, name this Gutzon Borglum work, a South Dakota presidential monument.
One site that was passed over for it is known as The Needles, and a technique used in it is "honeycombing". A nearby structure contains sixteen porcelain enamel panels as well as a titanium vault, two finishing touches in its Hall of Records. It saw the use of a protractor twelve times bigger than usual, and construction of it began with the drilling of six holes. The beard of one figure on the far right delayed its construction, and dynamite was used to grade contours of the figures' lips. For 10 points, name this Gutzon Borglum work, a South Dakota presidential monument.
One site that was passed over for it is known as The Needles, and a technique used in it is "honeycombing".
Mount {Rushmore} National Memorial