| 1. Arhipelaag
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| A non-profit research and development organization whose purpose is to foster a sustainable way of life on the coast and islands. [Estonian, English]. |
| http://www.arhipelaag.ee |
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| 2. Hiiumaa Islets Landscape Reserve
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| An area comprising several islands south east of Hiiumaa, protects 187 species of birds and is rich in flora. [Estonian, English]. |
| http://www.laiud.hiiuloodus.ee |
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| 3. Hiiumaa.ee
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| Information about the island-county, its history, culture, economy and tourism, local communities, links to related sites. [Estonian, English]. |
| http://www.hiiumaa.ee |
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| 4. Kassari Ratsamatkad
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| Nature trails on horse back. [Estonian, English, Finnish, German]. |
| http://www.kassari.ee |
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