Fantasmic is held on the Rivers of America (on Tom Sawyers Island). So you sit in New Orleans Square infront of POTC and along the ROA to see the show. Be prepared to arrive early, at least an hour before the show to stake out your spot. It doesn't always show every night so check the calender on disneyland.com to be sure. It usually has a 9 and 10:30 pm showing, and if you atend the 9pm showing you can stay put and see the fireworks.