Aouk-Kladuk Underground River

Kladuk River in the Kladuk Abyss

World’s most powerful underground river. Aouk-Kladuk Underground River is some 1.5 kilometres long. The stream has a volume of 130 – 180 cubic meters.

Keek sinkhole

Keek Sinkhole, Aouk Underground River

One of the tiankengs of Aouk Underground River. Keek sinkhole is bell-shaped hollow that is some 160-180 m deep, its volume is 1.4 million cubic meters.

Hafasu Tiankeng

One of the tiankengs of Aouk Underground River. Hafasu Tiankeng is some 100 m deep, with a volume of 12 – 15 million cubic meters.

Kuom Tiankeng

One of the tiankengs of Aouk Underground River. Kuom Tiankeng is some 100 – 160 m deep, with a volume of 15 – 20 million cubic meters.

Aouk Underground River

Waykut - entrance in the Aouk Underground River. Note the speleologist in the center

Amazing system of more than 6 km long underground passages with one of the most powerful underground rivers in the world. System has three tiankengs.

Yogoluk Sinkhole

Up to 240 m deep and 180 m wide sinkhole with vertical walls, formed over underground river.