Travel deep dive
The Dead Sea: A Body of Water That Breaks the Normal Rules
The Dead Sea sits at 430 metres below sea level in the Jordan Rift Valley — the lowest point on Earth's land surface — and almost everything unusual about visiting it traces back to one fact: the water is roughly ten times saltier than the open ocean.
Updated 2026-08-15
The physics of floating
Ordinary seawater is about 3.5% salt; the Dead Sea runs at roughly 34%, a concentration high enough that the water's density exceeds the human body's, which is why swimming in the conventional sense is essentially impossible and floating is effortless instead — most visitors' first attempt produces a startled, involuntary bob to the surface rather than the sink they instinctively brace for. That same density is why the water stings intensely: the high concentration of magnesium, potassium and calcium salts is genuinely painful in open eyes within seconds and will sting any cut or broken skin, which is the entire reason for the standard visitor etiquette of floating face-up and keeping your head dry rather than swimming normally.
The mineral mud, beyond the novelty
The black mud that collects along the shoreline is mineral-rich sediment from the surrounding rift valley, and applying it to skin and letting it dry before rinsing off is the other standard half of a Dead Sea visit — genuinely popularised commercially as a skincare treatment, with cosmetics brands built around Dead Sea mineral extracts sold well beyond Jordan. Whatever the cosmetic claims, the mud-and-float combination is at minimum a distinctive physical sensation unlike anything most visitors will have tried, which is a large part of why it remains one of Jordan's most consistently recommended stops regardless of how the skincare claims are weighed.
A sea that is measurably disappearing
The Dead Sea has been shrinking for decades, dropping by approximately one metre in surface level per year — a rate driven mainly by upstream diversion of the Jordan River, the sea's main historical water source, for agriculture and drinking water across the region, combined with mineral extraction by industry on both the Jordanian and Israeli-Palestinian sides. The retreat is visible on the ground: former shoreline is now a walk from the current waterline at many points, and sinkholes caused by freshwater dissolving underground salt deposits as the water table drops have become a genuine hazard in some areas, which is why resort access points are managed rather than open, undeveloped shoreline. The shrinking is one of the more concrete, visible examples of regional water stress a traveller is likely to see anywhere in the Middle East.