Just returned from our cruise on the Valor and the Altun Ha - River Wallace tour was the highlight of our excursions!! Fantastic ruins (my first ones but still impressive), great tour guide (Jewel) and the River Wallace portion was great - saw Howler monkeys, dolphins, iguanas, bats, crocodiles, all sorts of birds... Even stopped at a nice place between the ruins portion and river portion for lunch (it's also where we caught the boat). You can see photos at http://www.flickr.com/photos/lecruisers322valorcruise/set, or read a review of our cruise (in detail) at http://www.cruisecritic.com/memberreviews/memberreview.cfm?EntryID=5328. But I highly recommend this excursion!!!