Mystery largely shrouds the formation of the only twin crater lakes in Africa, Lake Kyema and Lake Kamweru. The pair is located in western Uganda in Magambo Sub-county, Rubirizi District. They are part of the 32 crater lakes that sit on the western arm of the East African Rift Valley.
Separated by a small portion of land, Lake Kyema spots clear water while Kamweru’s water is green. It is said the green colour of water is due to fish droppings known as omuboyo in the local Runyakitara language.

Although science attributes the formation of these lakes to volcanic eruption in the 17th Century, according to locals of Magambo Sub-county, Lake Kamweru was a crater which later got filled up with water from a nearby lake Nzuguto, that is now a wetland.

“The Nzuguto lake shifted from the current Nzuguto wetland and filled Kamweru crater basin to form the current Kamweru crater lake in the 1930s. Many people who lived in Kamweru crater died.
“Heavy water waves, commonly known as endyoka mukama we Nyanja (Endyoka king of the lake), passed through the soil via the cave and transferred water from then Lake Nzuguto,”

Lake Kamweru has a heritage cave besides it which fills the crater with water and there are many tree species around it harbouring monkeys and other wild animals.
The heritage cave is said to have been the hiding place for the residents. https://trendstours.com/