We spent our 19th anniversary at Epcot (no surprise).
Wandered around for a while, rode some of our favorite rides, then had lunch at Tutto Italia (delicious).
The sky was a beautiful blue, but by 2:00 (when we finished lunch) it was in the high 90s with a heat index around 111, so we headed home.
While Epcot is our favorite park, it is wide open, with very little shade, so on hot days you can get overheated very quickly.

The "golf ball" is actually a ride called Spaceship Earth, which is a nice, cool, slow-moving ride through time.
The obelisks on the left are called "Memory Makers". You used to be able to buy a tile to be added to them.
We have one that has a picture of us along with the date 2002 and a note that it was our "honeymoon", because we couldn't afford one until we had been married for 6 years. :)