Thursday, February 21, 2019

Hafasu Tiankeng

Part of the enormous Aouk Underground River is a giant sinkhole - Hafasu Tiankeng. Hafasu Tiankeng formed when the ceiling of a cave above the...

Kuom Tiankeng

One of the features of the unique Aouk Underground River is a giant sinkhole - Kuom Tiankeng. This giant hole in the Arfak Mountains was...