Lake Afera doesn't have a salt crust, and it's possible to swim in it. Both locals and tourists do it, and the experience is reportedly similar to swimming in the Dead Sea.
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Lake Afdera, Lake Giulietti
Danakil's largest salt lake, around in size, 102 m below sea level and with a depth of up to 160 m. Salt is also extracted here, not dug up but collected from evaporated salt water.
Erta Ale volcano
The most active volcano in Ethiopia with the name translating to "smoking mountain". The crater of this volcano contains a lake of liquid lava. It's one of the few volcanoes worldwide with an active lava lake, and together with Dallol another top attraction in the Danakil. There's a 2.5-hour walk to reach the volcano from the base camp. Lava flows can be observed from afar, and if it's windy, smoke blows all over the place, decreasing visibility. The fact that the volcano is active means the shape of the crater and the level of lava keep changing. Hike up at night when it is not so hot with your guides and armed guards, view the lava lake in the dark, then catch a few hours' sleep at the summit before walking back down before the day's heat rises too far.
Another salt lake, southeast of the former, and in size. This place isn't often included in the tour itineraries.
Not to be confused with Lake Assal in Djibouti. This salt lake, one of three in Danakil, is 116 m above sea level and has a surface of . Near the shore, the salt surface is hard enough to drive on, like a frozen-over lake. The salt flats are mined by hand, with the slabs of salt loaded onto to camel trains and taken to Hamed Ela, from where they are trucked to Mekele. Salt has been mined here this way for centuries.
A small salt lake south of Dallol with the second highest salinity of any lake in the world - 43%. It's also a very young lake, as it was formed only in 2005 after an earthquake. The water temperature is around +50°C, and gasses released make the water bubble and create geyser-like outbursts.
Southwest of Dallol, these canyons have been formed through erosion. Up to 40 meters in height, from a distance they look like ancient ruins.