Kalambo
Zambia
The Kalambo structure is a Lower Palaeolithic wooden structure, of which two pieces have been uncovered along with other wooden tools. Discovered at the site of Kalambo Falls, Zambia, it is currently the oldest known wooden structure, determined through luminescence dating to be at least 476,000 years old, predating Homo sapiens.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).