Bimmah Sinkhole – A lake of turquoise waters

Hawiyyat Najm, known as Bimmah Sinkhole in English, is a water-filled sinkhole in the limestone of eastern Muscat Governorate in Oman. The sinkhole was formed by a collapse of the surface layer due to dissolution of the underlying limestone. However, locals used to believe this sinkhole in the shape of a water well was created by a meteorite.The Arabic name Hawiyyat Najm means “the deep well of the (falling) star”.

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Danakil Despression

The Danakil Depression in Ethiopia is a geological depression that has resulted from the divergence of three tectonic plates in the Horn of Africa. Τhe Danakil Depression is the hottest place on Earth in terms of year-round average temperatures. It is also one of the lowest places on the planet (100 m below sea level, and without rain for most of the year. Among the geological points of interest to tourists are the hydrothermal system of Dallol and the Yellow Lake.

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The Hanging Lake

Hanging Lake in Colorado. Early tales of the discovery of the lake tell of a man searching for gold in the canyon. The man found a dead horse at the opening of a gulch (the possible origin of the name of Dead Horse Gulch). When he followed the gulch up through the steep hillside through the canyon he came around the back side of the lake. This is how he first saw the small bowl-like basin hanging onto the cliffs below.

Joshuahicks, CC BY-SA 3.0, via Wikimedia Commons
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