Indonesia

Narrow channel in the seaside cliffs. At the end of the channel, waves crash against the cliff wall creating a huge splash - fountain....

A small sea bay with overhanging cliffs. At high tide and stormy weather the waves create powerful surges and fountains and rise a powerful...

The most powerful known underground river in the world is Aouk-Kladuk Underground River in the Bird's Head Peninsula of New Guinea. Bird's Head Peninsula The western...

Amazing feature of the unique Aouk Underground River is narrow, deep hole through the rainforest and deep in the ground - Keek sinkhole. This deep...

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

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

There are a lot more underground rivers in the world than most people imagine. One of the largest and most impressive is Aouk Underground...

There are many interesting crater lakes around the world and many are exciting natural wonders. Some of the most surprising are the three Kelimutu...

There happen unusual discoveries but few have been as weird as the sensational finds in the sediments of Liang Bua cave in 2003. Turns...

One of the most unusual volcanoes on the world is Kawah Ijen. It contains the largest lake of acid in the world but especially...