The Washington Monument is between 560 ft and 561 ft tall .
Located almost due east of the Reflecting Pool and the Lincoln Memorial , the monument , made of marble , granite , and bluestone gneiss , is both the world 's tallest stone structure and the world 's tallest obelisk , standing 560 ft tall according to the National Geodetic Survey ( measured 2013-2014 ) or 561 ft tall according to the National Park Service ( measured 1884 ) .