NPR’s Ofeibea Quist-Arcton has a series of stories about her 500 mile journey down the Congo River in the DRC on a river barge. The overall journey starts in Kisangani and heads to Kinshasa.
The story was broadcast in five short (7min) installments on Morning Edition. Here is a link to the article about the series.
This reminds me of this section from “A Bend in the River”:
But at night, if you were on the river, it was another thing. You felt the land taking you back to something that was familiar, something you had known at some time but had forgotten or ignored, but which was always there. You felt the land taking you back to what was there a hundred years ago, to what had been there always.