I bought my tickets online several days prior to home for 18.99 each. The combo tour was 29.99 and o really wished o would've purchased that one.
At the counter, the Discivery tour is $26 and the Adventure tour is $29 if I remember right. You can do the combo for $49.
If you buy ahead they are cheaper. The range is like $19 to I think about $38 per person.
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