As a kid we visited Disney World 3 times around the holidays but it was never given as a surprise on Christmas morning. I can't imagine how excited I would have been to find "we're going to Disney World" under the tree!
-kara
The following year, our parents' business did very poorly. We were told that we were going to have a very small Christmas. When we woke on Christmas morning, we had one small package each - a tiny tin with a bow. Inside each tin was a picture of a character that resembled each brother - Mickey for the oldest, Donald for the youngest, and Goofy for me. We didn't catch on until the fourth present was opened - The Unofficial Guide to Walt Disney World. We absolutely flipped. Our grandparents had bought our family a trip to Orlando.
Since then, we've given up gifts and have had a small vacation every Christmas, instead. We still use the same tins that were used that morning, but we've gotten cleverer with our presentations. Last year, my parents had planned a trip to D.C. Each of the tins for my brothers and I had something relevant to the recipient (e.g., for me, the engineer, it was a snippet about Pierre L'Enfant).
My first trip to Disney World was a Christmas present for my brother and I when I was in first grade (my brother in 4th). I can still remember reading the note that my parents wrote for us to open on Christmas morning. We went for a week sometime in February that year. Still one of the best Christmas presents ever.