Glass Beach
Kauaʻi's famous former dump beach by Port Allen harbour, once carpeted in glass but now with only small fragments left.
Sand Island, at the mouth of Honolulu Harbor, has been a quarantine station, a coastal defence site and wartime internment camp, and a dump until a clean-up in the 1970s. That history shows up on its beaches, which a regular collector rates as the best sea glass spot on Oʻahu.
Rare cornflower blue, milk glass, UV glass, colourful sea pottery and shells reported; some rocks on the shore have glass and pottery embedded in them.
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Last updated 24 October 2026
Kauaʻi's famous former dump beach by Port Allen harbour, once carpeted in glass but now with only small fragments left.
California
© Grendelkhan · CC BY-SA 4.0 America's most famous sea glass beach, formed from old town dumps, now a protected state park beach where the glass must be left in place.
California
© Elaine with Grey Cats from California, USA · CC BY-SA 2.0 Rugged Santa Cruz County beach famed for rare art-glass nuggets and marbles washed out from the Lundberg Studios glassworks.
Quiet San Francisco Bay beach near the Richmond Bridge, often scattered with sea glass and rarely crowded.