The significant landmark in Washington, D.C., established to honor the first U.S. president is the George Washington Monument. Completed in 1884, this iconic obelisk commemorates George Washington's leadership during the American Revolution and his role as the nation's first president. Standing 555 feet tall, it was the tallest structure in the world upon completion. The monument serves as a symbol of democracy and national unity, attracting millions of visitors each year who come to pay tribute to Washington's enduring legacy in American history.