Iceland has an impressive number of waterfalls – an estimated ... the nearby glacier of Langjökull. The lava fields are also known for their hidden caves, with the longest cave in Iceland ...

From jaw-dropping entrances to echoing chambers and second waterfalls hidden underground, this cave had us in awe the ... s Kilauea volcano eruption shoots lava up hundreds of feet high What ...

Centuries of eruptions on the Big Island have created hidden networks of passages beneath volcanoes. In December 2016 a large lava delta formed by Kilauea volcano sank into the sea, exposing the ...

All the rocks under your feet in the park came from ancient volcanoes. The trails cross black basalt rocks formed by lava ...

Standing at 35-feet tall, Hedge Creek Falls is at the southernmost edge of the pre-Pleistocene lava flow ... the ability to walk behind the waterfall to the cave behind it. The cave was once ...

Formed by ancient seas, lava flows, and the patient ... Lookout Mountain near Chattanooga, this cave is home to a stunning 145-foot underground waterfall—one of the tallest and most dramatic ...

It includes Geomunoreum, regarded as the finest lava tube system of caves anywhere, with its multicoloured carbonate ... the highest in Korea, with its waterfalls, multi-shaped rock formations, and ...

Beneath the cliffs of Waterfall Bay is a vast network of underground caves carved out over several million years of constant pounding by the Southern Ocean. Within this cave system fossils up to ...