May 18, 2022. Celebrate International Museum Day at the new Museum of Illusions Philadelphia in Old City Philadelphia – right on Independence Mall -- the most historic square mile in America -- near Independence Hall and the Liberty Bell. Step into a world of illusions and explore more than 60 mind-bending installations. The visual and sensory experience combines education and entertainment. Guests are encouraged to let their imaginations run wild while learning about the mechanics behind each illusion. And take lots of photos. Designated photo spots are placed throughout the museum. Reserve tickets in advance online: $15 (kids) & $20 (adults), discounts for seniors, military and families, 10 a.m. to 9 p.m., 401 Market St., 267-703-2270, Moiphilly.com