Droitwich Spa: The Town Built on Brine Ten Times Saltier Than the Sea

Droitwich sits on massive salt deposits worked since ancient times — the Romans called it Salinae — and the natural brine underneath holds two and a half pounds of salt to the gallon, ten times stronger than sea water and rivalled only by the Dead Sea. The town's fortune was built on it: the brine baths opened in 1830, for floating in something that dense rather than for drinking. They have long closed, the last in 2008, but the open-air lido, reopened in 2007, is filled with brine diluted to the saltiness of the sea. John Corbett, the salt king, industrialised the trade and remade the town as a spa, and built Chateau Impney for his wife in the French château style; it has been closed since 2020.