The Coba ruins are a fantastic site and one of our favorite recommendations for a fun day outing with the family. The Coba ruins are home to one to one of the only pyramids in the world that you are still allowed to climb! The property itself is huge and we recommend renting bicycles to make your day in the jungle surrounding the ruins much more enjoyable. You can get bikes for around $3 for the day or you can hire someone to bike you around on a bike taxi for $5-$10 depending on how long you want to stay at Coba. We recommend packing snacks and plenty of water!