As an archaeologist, I found Quirigua interesting, but I do not recommend it to tourists. Stop if you happen to be passing by, and check out the tallest of all the Maya stelae and some cool zoomorphic sculptures. However, don't expect much else - the site is tiny, the environment is extremely muggy, and the artwork is a lower-quality knock-off of that at nearby Copan, Honduras. Definitely, definitely, definitely visit Copan! Copan and Tikal are the two Maya sites everyone should visit, in my opinion.