On the last Monday of every May, Americans celebrate Memorial Day, a national observance of the men and women who have died while serving in the U.S. military. Of course, other countries have their own version of this day, and throughout the world you’ll see memorials dedicated to those who have fought for their country. Although war seems to be the most popular subject, it doesn’t hold a monopoly on memorials, which could commemorate anything from a famous leader to a national movement. Read about the top five memorials >