In honor of International Museum Day we’ve collected twenty fascinating museums well worth visiting again. In this round up you’ll find classics - such as Bernard Tschumi Architects' New Acropolis Museum and Zaha Hadid Architects' MAXXI Museum - as well as lesser-known gems - such as Waterford City Council Architects’ Medieval Museum, the Natural History Museum of Utah by Ennead, and the Muritzeum by Wingårdhs. See all of our editors' favorites after the break!