Búðafoss

Some 180 m wide waterfall, approximately 2 m high.

Leppaluði borehole

Leppaluði borehole

Often tourists mix up two hot springs or geysers – the artificial and more active Leppaluði borehole and dormant Grýla – once impressive…

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.

Kitum Cave – salt mine of elephants

Kitum Cave, Kenya

Unique caves in pyroclastic rocks, up to 250 meters long. Possibly created by elephants and other animals digging the salt in caves up to this day. Kitum cave became known worldwide after two people caught the extremely dangerous and deadly Marburg virus disease in this cave.

Kefrida Falls

Kefrida Falls, Algeria

Some 44 m tall waterfall, lowest of three major waterfalls on Kefrida stream.

Strokkur

The famous bubble of Strokkur is rising, Iceland

Strokkur is a very intense geyser, erupting 25 – 35 m high every 4 – 8 minutes.