Hi, Laura!
There is so much great nighttime entertainment in Walt Disney World! The magic just goes on and on until the last minute possible!
Each park is a bit different. In Hollywood Studios, you really need to be in the
Fantasmic! ampitheatre to see or enjoy the show. Plan to be in line for this approximately 1 hour prior to showtime as this facility does often fill to capacity.
For Epcot, anywhere around the World Showcase Lagoon is perfect for viewing Illuminations. You might catch a random view of some fireworks once you leave that area, but you really need to be near the water for the full effect.
In Magic Kingdom, you can see fireworks from many points in the park including Tomorrowland, Frontierland, or even outside the park at the Contemporary, Polynesian, or Grand Floridian.
One really fun idea might be to go to Downtown Disney and take a ride on
Characters in Flight during the Magic Kingdom fireworks. Watching the show from 400 feet over Village Lake would be so fun!
Wherever you decide to watch all the nighttime magic, have fun! Plan ahead so you are not rushing to find a viewing spot, and sit back and relax. Enjoy!