Bonampak is a mayan city south of Yaxchilan (of which it was a dependency). Although not very big, it is famous for its painting in one of its buildings.
Curious experience when you arrive at the site and no private vehicles are allowed in. Some might even think they are walking into a scam. But truth is that the lacandon community has taken action as irresponsible and careless tourists left rubbish behind or damaged local flora and fauna.