I'm looking into doing a day trip to the mainland when I arrive later this month and was wondering if there are any tour companies on AC that combine Altun Ha with the zoo? The only ones I can find combine it with the spa, but I'm not really interested in that. If that is the only option, I've seen quite a range of prices for it (from $58US with Excalibur to $90US through Monkey Business and Tanisha) and was wondering if there are any differences that would account for such a large price difference. It looks like they cover the same things.. boat ride, stop at Bomba, spa, etc... but I want to make sure I'm really comparing apples to apples.