My most memorable vacation would have to be my honeymoon :)  DH and I have actually gone on many great vacations, but that one was the best! 

We went on a Carnival Cruise to the Bahamas!  It was absolutely amazing :)  We didn't get to do that much on one of the islands that we stopped at b/c they had recently been hit by a hurricane, but we still got to do some fun stuff--including seeing the famous Marching Flamingos at a wildlife conservatory thing there.  It was really neat. 

The best part, for me, was actually being on the ship.  I loved that it was all-inclusive and that there were so many things to do just right there on the ship.  We were in awe :)

It was also exciting because it was something that I never dreamed I would have the opportunity to do.  We are already looking forward to going on another cruise for an anniversary one day.

It was also memorable because it included a lot of our getting-to-know each other times, since we didn't live together or anything like that before marriage :)