Chichén Itzá

The most famous and best restored of the Yucatán Maya sites, Chichén Itzá, while tremendously overcrowded – every gawker and his or her grandmother is trying to check off the new seven wonders of the world – will still impress even the most jaded visitor. Yes, it's goosebump material. Many mysteries of the Maya astronomical calendar are made clear when one understands the design of the ‘time temples’ here. Other than a few minor passageways, climbing on the structures is not allowed.