sentences:  The area of the municipality was about 19.5 km².Walung and Utwa are home to the Utwa-Walung Marine Park, a conservation area established by Madison Nena, a local ecologist who has won several awards, including the Seacology Prize in 1999.In the late 1990s, Madison Nena successfully led a campaign to prevent property developers from building a tourist complex without adequate sewage facilities, and in its place he founded an eco-tourism initiative at Kosrae Village Resort.