Washington Monument  Washington DC<br />
The Washington Monument, a Washington D.C. landmark , is a large obelisk near the west end of the National Mall.  It is a United States Presidential Memorial constructed to commemorate the first U.S. president, George Washington. The monument, made of marble, granite, and sandstone, is both the world's tallest stone structure and the world's tallest obelisk.  A national icon and popular tourist attraction in Washington DC.