In the heart of the Congo Basin's Cuvette Centrale, a large depression that hosts the world's largest tropical wetland complex, lie two vast, shallow blackwater lakes, Lake Tumba and Lake Mai Ndombe. Together, they are roughly the size of 420,000 football fields.

Source: [Phys.org](https://phys.org/news/2026-07-lakes-ancient-carbon-congo-basin.html)

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