We also did the Historical City Tour, it was very good, well worth the price. WE took the Atlantis tour through
DCL and enjoyed it very much. The ferry boat to Atlantis was a historically narrated tour, which was nice. There was a short uphill walk from the dock to Atlantis hotel, the tour guides met you there and and broke you down into smaller groups. The tour was very good of the digs, they do move along quickly, however you can go back over and over again at your leisure once the tour is over. The ferry boat back runs about every 35 to 25 minutes all day, so no need to hurry.
We did the glass bottom boat tour too. It was short, but we did see lots of tropical fish. Didnt make it to the ship wreck, due to choppy seas. There is a bathroom on board, which is handy with kids. Even if you dont do a tour, you might enjoy the pirates museum. It's 2 blocks behind the straw market, a large purple building, you cant miss it. The pirate who greets you is a great salesman for the museum. I believe it was $12 per adult. Mostly its a replica of as pirate ship so you can see how they lived on board. Lots of real guns and swords towards the end. It is self-guided. A bit dark for the first 2 minutes, but then is well lit for kids. There is a lot of reading to do, some younger kids would not be able to do, but we loved it. The horse drawn carriage was fun too, $10. per person. The straw market is fun if you like to haggle for prices. Best deals late in the afternoon. The culture there is very different from ours, they do try to sell you stuff as you walk along, but if you look straight at the person and say NO they will move on to the next person. Lots of people are annoyed by this, but it is just how they make their living and are actually very friendly people.
Hope you have a great time.
mom x4,grandma x4