Amboni Caves

The Amboni Caves (Mapango ya Amboni, in Swahili) are a limestone cave complex in East Africa. They are located in Kiomoni ward of Tanga in Tanga Region of Tanzania off the Tanga-Mombasa road, 8 km north of Tanga City center. The reported length of the longest cave is 755m. The caves were formed about 150 million years ago during the Jurassic age. It covers an area of 234 km2. According to researchers the area was under water some 20 million years ago. There are altogether ten caves but only one is used for guided tours.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).