From 1850 to 1921, the seaside town of Seaham in northern England was home to Londonderry Bottleworks, reportedly the biggest bottle-making factory in Great Britain. For those 70 years, waste from the bottleworks, which produced everything from fizzy drink bottles to delicate hand-blown perfume flasks, was regularly dumped over the cliff into the sea. As a result, Seaham Hall Beach (also known as the North Beach or Glass Beach) is the richest source of sea glass in England. The waves toss a fresh supply of colored glass on shore each…
