Danakil Depression is desert region in the Northern part of the Afar Triangle where 3 tectonic plates press against each other, causing the land to sink. In order to enter the lowlands, one must get permission in Berahile, at about 120km from the Tigray capital, Mek'ele.
Dallol is one of the world's most spectacular landscapes: a vast area of uplifted thick salt deposits affected by intense fumarolic activity, probably caused by an active volcanic system beneath several kilometers of evaporation salt deposits. Dallol is said to be the hottest place on the planet, with average annual temperatures well above 30 deg C. The area commonly referred to Dallol volcano contains the approx. 1.5 x 3 km wide Dallol "mountain" (rising about 50 m above the great salt lake) near the border with Eritrea, and nearby warm springs including the Yellow Lake, the Black Mountain with the Blue Lake, said to be an explosion crater from a hydrothermal eruption in 1926.
Dallol is famous for its hot brine, and multicolored white, pink, red, yellow, green, gray and black salt deposits, hot springs and miniature geysers. These bizarre structures form in a complex interaction of solution and recrystallization processes driven by hydrothermal waters and rapid evaporation.