Dallol: A Deep Dive into the Most Alien Place on Earth
In the Danakil Depression of northern Ethiopia lies Dallol, one of the strangest and most otherworldly landscapes on Earth. Here, volcanic heat rising through thick salt deposits creates a riot of colour: neon-green and yellow acid pools, bright orange sulphur crusts, and bizarre mineral formations. Set in one of the hottest and lowest places on the planet, Dallol looks more like an alien world than anywhere on Earth.
A volcano below sea level
Dallol is a volcanic area in the Danakil Depression, lying below sea level in the Afar region of Ethiopia. It is part of the same rifting system as nearby Erta Ale, where the African continent is pulling apart. Rather than a towering cone, Dallol is a low, sprawling hydrothermal field, where heat from magma below interacts with thick layers of salt and brine to produce its extraordinary features.
A landscape of acid and salt
The defining feature of Dallol is its surreal palette of colour. Hot, acidic, mineral- rich brines bubble up to the surface, depositing vivid yellows, greens, oranges, and whites of sulphur, iron, and salt. Acid pools, salt chimneys, and mineral terraces create a landscape that seems to belong to another planet, constantly changing as the fluids shift and the minerals crystallise.
One of the hottest places on Earth
The Danakil Depression around Dallol is one of the hottest inhabited regions on the planet, with extreme year-round temperatures. Combined with its low elevation, its aridity, and its toxic, acidic environment, this makes Dallol one of the most inhospitable places imaginable, a true natural extreme that pushes the limits of where life and exploration are possible.
A laboratory for extreme life
Dallol's extreme conditions, hot, acidic, and salty, make it of great interest to scientists studying the limits of life. Researchers investigate whether microorganisms can survive in its harsh pools, with implications for understanding the boundaries of life on Earth and the possibility of life in similarly extreme environments elsewhere in the solar system.
A window onto other worlds
The alien appearance of Dallol has made it a focus for planetary scientists. Its hydrothermal systems and mineral chemistry offer analogues for environments that may exist or have existed on Mars and other bodies, where similar interactions between heat, water, and minerals could occur. Studying Dallol helps scientists interpret the chemistry of distant worlds.
The salt and the caravans
The Danakil region around Dallol has long been a place of salt extraction. For centuries, caravans of camels have carried slabs of salt cut from the vast flats across the desert, a trade that continues today. This ancient human activity adds a remarkable cultural dimension to one of the most extreme natural landscapes on Earth.
An extreme destination
Like nearby Erta Ale, Dallol is a challenging and remote destination, reached only by crossing the harsh Danakil desert in extreme heat. Yet adventurous travellers are drawn to its surreal beauty, walking among its acid pools and mineral formations in a landscape that feels utterly unlike anywhere else on the planet.
Explore on the map
Dallol stands among the volcanic features of the East African Rift, alongside Erta Ale and the other volcanoes of the Danakil Depression. Explore it on the interactive map — filter by country to see Dallol among Ethiopia's volcanoes and to appreciate the extraordinary volcanism of the rifting African continent.