The Washington Memorial is without any doubt one of the most iconic landmarks in Washington, District of Columbia. It was build to honor the Father of the Country, George Washington, first President of the United States (1789 - 1797). The obelisk, constructed in several stages, is made from marble, granite and sandstone and measures 555.5 feet (170 m.).
Dan Brown chose the Washington Memorial as the key building in his book "the Lost Symbol". Reasons enough for me to bring a special visit to the world's tallest masonry structure, unsupported by steel ... By the way, the views over Washington DC (and 3 states) from the observatory are magnificent ! Check it out HERE.