"The Roman emperor Hadrian built this villa as his country estate outside Rome. Its ruins are recognized as his greatest artistic achievement and bear UNESCO World Heritage status. Archeology lovers and history buffs will be drawn to this historically charged site, but it's also nice if you just want a stroll in the fresh air; it's a great spot for those who've already seen Rome's major sights and want to dig deeper. The Maritime Theater—an artificial island built as the emperor's private residence—is worth seeking out. Just be aware that it's all outside, so don't come if the weather is lousy." - Laura Itzkowitz, Arlene Gibbs