Cateura sits in the bañados, the low-lying floodplains of southern Asunción, wedged between the open landfill and the Paraguay River. Neighborhoods like Bañado Sur, San Miguel, and Santa Ana spread across this flood-prone ground, where homes are built from raw brick or assembled from corrugated tin and salvaged materials. When the river rises, as it does in heavy rains, the water comes for these houses first. Thousands of families live here, and a large share of them work as gancheros, recyclers named for the ganchos, the hooks they use to pull recyclable plastic, metal, and cardboard from the incoming waste. It is hard, undervalued labor, and it sustains entire households.

In 2006, Chávez, a young environmental technician working at the landfill, started offering music lessons to the children of the gancheros. Word spread fast. Soon he had far more students than instruments, and real violins were both scarce and, in this neighborhood, almost dangerously valuable. The solution came from the landfill itself. Working with a local recycler and gifted carpenter, Chávez began building instruments from what the dump offered: a cello from an oil drum and a discarded cooking tool, a violin from a paint can and a dinner fork, a saxophone from drainpipe and bottle caps. The instruments were not novelties. They held a tune, and the children learned to make them sing.

It would be easy to tell this story as a tale of poverty redeemed, but the families of Cateura tell it differently. The orchestra gave their children something the gancheros' world rarely offered outsiders' respect, and something more important than that: a reason to imagine a future. Parents who spent their days bent over other people's refuse watched their sons and daughters tune a violin and read a score. The ingenuity on display was not new to Cateura. These were people who already made livings, and lives, out of what others threw away. The orchestra simply turned that everyday resourcefulness into something the wider world could finally hear.

The 2015 documentary Landfill Harmonic carried the orchestra's story far beyond Paraguay, and the young musicians followed it. They toured internationally, shared a stage with Stevie Wonder, and performed for Pope Benedict XVI at World Youth Day in Madrid. The music school that started with a handful of children grew to teach hundreds, offering free lessons to kids from the neighborhood. Fame brought scrutiny, too, including later disputes over how the project's donations were managed, the kind of growing pains that often follow when a grassroots effort meets global attention. But the core remains what it always was: children from the bañados, instruments from the dump, and a sound that insists on being taken seriously.

The name Cateura comes from a lagoon near the original site, and the place still wears its geography plainly. The landfill rises as a low, terraced mound of compacted waste, threaded by truck tracks, with flocks of birds wheeling overhead. Beyond it, the Paraguay River curves wide and brown toward the city center. The settlements crowd the strip of land in between, close enough to the water that flooding is a recurring fact of life. It is not a postcard view. But it is the ground from which a remarkable thing grew, and knowing what happened here changes how you see it.