Santa Cruz, the largest city within the lowlands, is located here, as are the majority of Bolivia's petroleum and all-natural gas reserves. The southeastern part of the lowlands is part of your Gran Chaco. Pretty much rainless for 9 months with the 12 months, this spot turns into flooded for your three months of heavy rains. The intense variation in rainfall supports only thorny scrub vegetation and cattle grazing, While new discoveries of here normal gasoline and petroleum near the foothills of the Andes have captivated some settlers on the area.