Kawainui Marsh or Kawainui Fishpond is a wetland and former fishpond in Kailua, Hawaiʻi. It is the largest remaining wetland and the largest ancient freshwater fishpond in Hawaiʻi, and a designated Ramsar Convention wetland.
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Official website http://www.kawainuimarsh.com
Address Maunawili 96734, United States
Coordinates 21°23'57.468" N -157°45'13.994" E