San Diego's new Museum of Illusions, which opened in the summer, is an interactive space filled with optical illusions that can be explored. The museum includes a giant kaleidoscope or a "vortex tunnel" surrounded by spinning lights. Staff members are available to photograph the illusions, which make for great photos. The Museum, which started in Croatia in 2015, is now in over 40 locations, including 22 in the U.S. The first California location will be permanently located.