Geography
The Congo is the world's deepest river, and it crosses the equator twice
In places the Congo River plunges past 220 metres deep, deeper than any other river on Earth. That extreme depth comes from a series of cataracts near its mouth where the riverbed drops away sharply. Because the river loops across the equator twice, it draws rain from both hemispheres year-round, giving it a steadier flow than rivers governed by a single wet season.