Santa Cruz, the largest city in the lowlands, is located here, as are most of Bolivia's petroleum and 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 here location turns into flooded for your three months of heavy rains. The intense variation in rainfall supports only thorny scrub vegetation and cattle grazing, While modern discoveries of normal gas and petroleum near the foothills of your Andes have captivated some settlers on the region.