The Tree of Life is a single mesquite standing 9.75 metres tall in bare Bahraini desert, with no surface water for kilometres in any direction. Less than 100 millimetres of rain falls here in a year. Its survival is usually called a mystery, though botanists give a plain answer: a mesquite sinks a taproot straight down, and this one is thought to reach groundwater some 50 metres beneath the sand. Bahrain has always held that hidden water — the freshwater springs welling up through its desert and even its seabed are what made the island famous in antiquity. The tree's age is the firmer wonder. A dating study in the 1980s put its germination around 1583, which means it has held this spot, alone, for roughly four centuries. It stands on a low mound that is no natural dune: buried beneath it are the remains of an older settlement.
The drive crosses Bahrain's oil field, past pipelines and wellheads, then the ground empties out: a flat pale horizon, a low rise, and one green crown holding the only shade for kilometres. Its branches sag until they rest on the sand. Up close you see what the fame has cost — names gouged into the bark, holes at the base of the trunk, cracked limbs. That is why you can no longer stand beneath it: a low wall rings the tree, guards watch it around the clock, and the 65,000 visitors a year take it in from the perimeter, or from the small visitor centre that displays the finds from the dig. Stay until dusk. Floodlights set low in the sand come on, throwing the whole crown into relief, and the tree becomes the only lit thing in a black desert.