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Vanuatu is party to the Convention on Wetlands (Ramsar Convention)...The first site for Vanuatu...registered as the first internationally recognised Ramsar wetland site is Lake Letas on Gaua. Lake Letas is Vanuatu’s biggest lake and one of the largest volcanic lakes in the Pacific. Vanuatu has around 13 sites that qualify as national wetlands and these include Lake Letas on Gaua, ‘Duck’ Lake above Teouma on Efate, Port Stanley on Malekula and Blue Hole on Santo.