The sink is located about 200 metres downstream from the main road. It is the lowest point in the dry valley, where the stream sinks in times of flood only.
Description
A very large sink, about 20 metres deep, with rifts in the East wall, near the entrance to it. It would be a massive task to open the sink as where to dig would involve going through tons of mud. In extreme flood conditions, the sink fills up and the water flows down the valley, sinking at Guthole.
History
Hydrology
Conservation
SSSI: 1036 Pwll-du Head and Bishopston Valley (Mixed/M)