This could be answered with a simple word, corners. The corners of the map in PUBG mobile are always the least populated with shooters with some exceptions like Georgopol and Novo. This is resulting from people preferring locations that are more central to get to the first circle. Names for abandoned areas in Erangel will be the Promsok and Zharki. In Miramar, there is the Ruins and Campo de Militar. And Vikendi has Winery.