If you want extraordinary Mayan sites without the crowds, you just have to head deep into the jungles of the Yucatán Peninsula, discovers Graeme Green.

The road ahead is blocked. Standing between us and the ancient Mayan city of Calakmul, deep in the Yucatán Peninsula, there’s a strange and colorful bird with either a perverse sense of humor or a stubborn streak. Every time we stop the car, the bird—a wild, blue-headed Ocellated Turkey with wings of green, brown and gold—moves to the side of the road. But as soon as we rev the engine or inch forward, it moves right back in front of us, making it impossible to pass.

There are worse ways to be held up; the bird’s immovability allows us ample time to get out and photograph it. But after 10 minutes, it stretches the patience. We finally make it past, only for another technicolor turkey to appear, shortly joined by a posse of feathered friends further along. This could take some time…