At $10 for an adult ($9 if you're a AAA member, $8 for seniors), Cypress Gardens SC is priced far below other similar attractions. For an additional $5, you can take a 30-minute guided boat tour of the swamp.
My advice: Make sure you do the boat tour! Honestly, the rest of Cypress Gardens was disappointing. There was a building that contained all kinds of large aquariums with fish in them, but there seemed to be no theme. You ask yourself, "Why these particular fish? Are they natives of SC? How are they alike or different?" but there is simply nothing that holds the exhibit together. Same with the reptile area. There was also a parrot exhibit, but why these particular birds? The butterfly house was the best of the exhibits.
Ah, but now we get to the guided boat tour of the swamp. Now, that was worth the price of admission. Twelve people including the guide were on a large-ish flat bottom row boat as the guide slowly paddled us through the swamp, pointing out interesting spots. We saw alligator nests, places where major movies had been filmed on this swamp, a gazebo that can be rented for weddings, etc. Our guide told us why the swamp water is black, but showed us how clear the water really is. Amazing!
After the boat tour, we walked one of the paths through the property. The pathways were clear and smooth, easy to walk, and we would occasionally see something interesting, but the main thing we got out of the walk was exercise.
Bottom line, I would say the swamp tour was worth $15 to $20, and the rest maybe $5.
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