New York City Built a WWI Victory Monument Out of 85,000 German Helmets

The United States hasn't officially celebrated the end of a war since the 1991 National Victory Celebration capped off the end of the Gulf War. Before that, Americans celebrated the end of World War II with a massive victory parade down New York City's Fifth Avenue in 1946.
New Yorkers also hosted the nation's World War I victory celebration in 1919. Being part of the winning team in the "War to End All Wars" was a big deal, and the city's Park Avenue was transformed for the event. For a full week, a five-block stretch of one of New York's busiest streets was shut off from the usual din of streetcars, carriages and those newfangled cars to clear a path for Victory Way.