Dilburnu Nature Park () is a nature park in Istanbul Province, Turkey.
Geography Dilburnu (literally "Cape Tongue") is situated on the western part of Büyükada (literally: Big Island), the biggest of the Princes' Islands, a group of nine islands in the Sea of Marmara, in Adalar district southeast of Istanbul Province. Dilburnu and its surrounding area were declared a nature park by the Ministry of Environment and Forest in 2011. It covers an area of about .
See also Büyükada Nature Park, on the eastern part of Büyükada Değirmenburnu Nature Park, on the neighboring island Heybeliada
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