WASHINGTON D. C.
The Washington Monument, an obelisk sitting almost in the center of the National Mall, was built in remembrance of George Washington the 1st President of the United States. It is the world’s tallest obelisk, standing 554′ 7″ tall. Construction of the monument began in 1848 and due to lack of funds it wasn’t completed until 1884. It is surrounded by 50 flags representing each of the 50 states.