Calakmul is a Maya archaeological site in the Mexican state of Campeche, deep in the jungles of the greater Petén Basin region. It is 35 kilometres from the Guatemalan border. Calakmul was one of the largest and most powerful ancient cities ever uncovered in the Maya lowlands.

Why was Calakmul abandoned?

Between the ninth and tenth centuries, both Tikal and Calakmul were progressively abandoned for no apparent reason in what is known as the great Mayan collapse. The jungle is so impenetrable in that region that during the entire colonial era Calakmul went unnoticed.

Can you climb Calakmul?

The ancient ruins of Calakmul are HUGE. ... Yes, you can climb the ruins! Just like the ones at Coba. This is rare in Mexico these days, but I think it's because this site gets so few tourists.