Bosch was a West Frisian island in the Wadden Sea. It was situated off the coast of present-day Groningen in the Netherlands, between the islands of Schiermonnikoog and Rottumeroog.
Between 1400 and 1570 CE, the island Monnikenlangenoog had split into the islands Bosch and Rottumeroog. Bosch disappeared in the Christmas Flood of 1717.
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