Fodor's Expert Review MAXXI—Museo Nazionale delle Arti del XXI Secolo

Designed by the late Iraqi-British architect Zaha Hadid, this modern building plays with lots of natural light and has curving and angular lines, big open spaces, glass ceilings, and steel staircases that twist through the air—all meant to question the division between "within" and "without." The MAXXI hosts temporary exhibitions of art, architecture, film, and more. The permanent collection, displayed on a rotating basis, has more than 350 works from modern and contemporary artists, including Andy Warhol, Francesco Clemente, and Gerhard Richter.