Ondiri swamp is located a kilometer away from Kikuyu Town in Kiambu County. The swamp, which stands on a 30-hectare piece of land, is 10 kilometres deep. It was named by a white man during colonial times ‘old lake’, which locals translated to Ondiri.
The swamp is the only quaking bog – wet spongy and shaky ground that has no foundation- in the country and is the second deepest wetland on the continent after another in Doula, Cameroon. This little-known perennial swamp serves as an underground outlet to Lake Naivasha. Ondiri Swamp is a popular leisure oasis and its visitors particularly like to hop on the bogs.