Funny you should ask. I went to California in August and saw as many sites as I could. Saw almost all of the exterior locations (and some interior) for Karate Kid and Back to the Future (and BTTF2), Including Daniel and Marty's houses. Could not get to the main part of Hill Valley where the clock tower was because that was the back lot of universal, but got to the beaches, the dojos, the twin pines mall, etc. Went to Pasadena (gorgeous area, forgot to go to the Rose Bowl) to see Doc Browns' house. Wanted to get to the E.T house, and the locations for Terminator 2, but ran out of time. Went to Griffith Observatory, where they filmed the beginning scene of the Terminator where he takes the thugs clothes. Went to the Santa Monica pier where Forrest Gump ran to. Also, when I was in DC in June, went to where they filmed "The War in VIET F***** NAM!" scene in Forrest Gump on the steps and Forrest saw Jenny in the reflecting pool. Also, in New York at the Ghostbusters library, the Trinity Church in National Treasure, Katz's Deli in When Harry Met Sally. Been to Central Park near where they filmed ELF and Ghostbusters (Walter's apt and Dana's apt) Lastly, the Art Museum in Philadelphia. It's amazing how many people run up the steps constantly.