The sandstone escarpments that give Serranópolis its name are riddled with rock shelters, and the shelters are covered in work. At least forty caves in the municipality carry paintings left by earlier inhabitants — lizards, rheas, parrots, and geometric designs that resist any easy reading. Systematic excavation began in the 1970s under Pedro Ignácio Schmitz and Altair Sales Barbosa and ran into the 1990s, covering thirty-three sites. Across fourteen of twenty-six shelters studied, researchers catalogued more than 1,100 painted figures and roughly 4,000 engravings. New sites keep turning up; a recent survey added at least thirty more. The complex is now regarded as one of the most significant in Latin America, and the reason is not any single spectacular find but the sheer continuity — layer after layer of occupation in the same shelters, over a span of time it is genuinely difficult to hold in your head.

Serranópolis is among the largest municipalities in Goiás by area and among the emptiest. Population density was recorded at 1.45 inhabitants per square kilometer in the 2022 census, with a total of 8,027 people municipality-wide. There are 604 farms occupying 407,000 hectares, of which only around 25,000 hectares were planted — the rest is pasture and woodland. The cattle herd stood at 229,000 head, roughly thirty animals for every human being. Rice, sugarcane, manioc, sunflowers, sorghum, corn, and beans all grow here, but soybeans dominate the planted ground at some 24,000 hectares. It is a landscape of long distances and low horizons, where a neighbor is a twenty-minute drive and the road ahead of you disappears into cerrado scrub without much apparent reason to end.

European occupation of this ground is startlingly recent given how long people have been here. The first settlers arrived in the 1880s and planted rice, tobacco, coffee, corn, and beans. The place they built was called Serra do Cafezal — coffee-grove ridge — until 1943, when the name was changed to Nuputira, and then changed again to Serranópolis in 1953. It broke away from Jataí to become its own municipality in 1959. Serranópolis now sits 50 kilometers south of Jataí and about 80 kilometers north of the Mato Grosso do Sul line, bounded by Jataí, Aporé, Mineiros, and Itajá, and crossed by the Verde and the Corrente — two rivers that feed the Paranaíba. The state capital, Goiânia, is 381 kilometers away by road.

Just to the west lies Emas National Park, named for the ema, the greater rhea — Brazil's flightless giant, striding across open grassland in groups. Emas protects some of the best-preserved cerrado left anywhere and was inscribed as a UNESCO World Heritage site in 2001 alongside Chapada dos Veadeiros. Giant anteaters work the termite mounds there in daylight; maned wolves cross the campo at dusk on their absurd stilt legs. And at the start of the rainy season the mounds themselves light up. Larvae of a click beetle, Pyrearinus termitilluminans, live in the outer walls and glow green to lure flying termites, turning whole fields of earthen towers into a slow constellation across the ground. The same rheas and lizards painted on Serranópolis's shelter walls are still out there, on the other side of eleven thousand years.

For a place this quiet, Serranópolis carries an unusual burden. The archaeology is not settled, the sites are not all found, and the paintings are weathering — degradation of the rock art and the shelters themselves is now its own field of study. Meanwhile the soybean frontier keeps moving. The two things coexist awkwardly: a working agricultural municipality with a modest hospital, nine schools, and no higher education, sitting on top of a record of human presence in the Brazilian interior that researchers have been arguing over for fifty years and will be arguing over for fifty more.