The Washington Monument in Washington, D.C. is 55 feet across on each of the four sides at the base and 555 feet high.
Why all the fives in the measurements? Some sort of secret Masonic thing? Nobody knows for sure.
Built to commemorate the first U.S. president, General George Washington, the Washington Monument is made of marble, granite, and sandstone.
Designed by Robert Mills in the 1840s, it is the world’s tallest stone structure, and is also the tallest structure in Washington D.C.
The Washington Monument is located east of the Reflecting Pool and the Lincoln Memorial.