From - BBC World News By- Jasmin Fox-Skelly Edited by - Amal Udawatta Getty Images Constructed over 1,200 years ago, the imposing 65m-tall (213ft) Temple IV at Tikal, in modern Guatemala, is a testament to ancient Maya masonry (Credit: Getty Images) Ruins of ancient cities keep turning up in the forests of central America. How have these structures remained standing for millennia despite tropical rains, hurricanes and the return of the jungle? Anyone driving down the rough asphalt of highway 269 that bisects the Yucatán peninsula in southeast Mexico would never have known it was there. Thick jungle lines both sides of the road for much of its length, with the occasional patch cleared for livestock. Yet, after an innocuous bend in the road, close to the tiny settlement of Dos Lagunas, an entire city has been hiding. Concealed beneath a tangle of trees, vines and other vegetation, scientists have discovered a sprawling col...