Not to be missed are the Philadelphia Magic Gardens – mosaic environments in dozens of locations by Isaiah Zagar. My daughter and I loved our workshop with Isaiah! The Philadelphia Museum of Art is home to the largest collection of works by Marcel Duchamp. In fact, most of his major pieces are here. There are also great pieces by Cy Twombly & Brancusi. It is well worth a visit – as is the Rodin Museum down the street. While in Philly, don’t forget to check out the Mural Arts Program – the largest mural initiative in the country – and have some Italian ice!