These photos capture a bit of the "steepness" of the ruins. Pictured are Jim and Donna of s/v Go My Way, our travel buddies to Coba.
The ruins at Coba are so different from other one's we visited. This site is in the jungle and it's huge. I'd recommend renting a bike. We had a very heavy tropical downpour towards the end of the day, which was actually kind of fun.