It’s impossible to miss the white marble Vittorio Emanuele monument dominating Piazza Venezia. Built in the late 1800s to honor the first king of a united Italy, this flamboyant (and widely disliked) landmark has been compared to everything from a wedding cake to a Victorian typewriter, its harsh white color glaring in a city of honey-gold tones. An eternal flame burns at the Tomb of the Unknown Soldier. For a panoramic city view, take a glass elevator to the Terrazza delle Quadrighe (Terrace of the Chariots) ★.