Concealed beneath a tangle of trees, vines and other vegetation, scientists have discovered a sprawling collection of houses, plazas, temple pyramids and even a ballcourt used for ball games that have the "hallmarks of a Classic Maya political capital". The remains of the city, which the researchers have named Valeriana, are among 6,674 structures they found scattered in sites across the state of Campeche on the western side of the Yucatán peninsula. Some of the largest platforms may even rival more famous pyramids at other Maya sites.