By far the best things we did were go on a Havana city tour for the whole day, and the Jolly Roger Catamaran tour that started with a dolphin show.
Quick Tips:
1. When leaving the resort bring toilet paper! We went to one place that had NONE, and others make you pay!
2. Take lots of bottled water - it gets damn hot in Cuba, and it's so easy to get dehydrated quickly! (besides, I don't recommend the water there).
3. Before leaving for Cuba I had researched a lot, and discovered the poverty that is throughout the country, so we took along some gift bags with soap, shampoo, face clothes, hair accessories, tooth brushes/paste, tampons, candy, pens/paper, etc. to leave with the maids/locals...they were VERY appreciative, and the look on their face was well worth the small gift.
4. Sunscreen - SPF 30!!! And re-apply often!Best Way To Get Around:
Since this was my very first time away from Canada I was a little apprehensive about leaving the resort alone, so we took guided tours of Havana, and a catamaran tour out to Caya Blanco along with a dolphin show. Also, our hotel offered a free "train" ride into Varadero (it's actually not a real train, but it looks like one) so we could do some shopping. There are also lots of locals around with horses and carriages, apparantly it's well worth the - they'll take you anywhere in town. I saw no problem with walking around Varadero, also. As for in Havana, there are little CoCo Taxi's (I think that's what they're called) - cheap, and they'll get you places. By far the best way to see Havana is by foot, though (especially in Old Havana).