U.S. monuments are more than just field-trip fodder for the grade-school set. Sure, they're educational. But these larger-than-life landmarks are also downright dazzling. Here are our picks for the 10 most iconic monuments in the U.S. Swing by one of these sites on your summer vacation and you can stand at the spot where game-changing historic events took place, snap photos worthy of a magazine cover, or take in spectacular views from atop soaring sculptures.