About Una-Una Island
Una-Una Island is a small volcanic island in the Gulf of Tomini, part of the Togian Islands archipelago in Tojo Una-Una Regency, Central Sulawesi, Indonesia. Dominated by Mount Colo volcano, the island is known for its dark volcanic sands, coral reefs and dive sites. Evacuated after the 1983 eruption, it has been resettled and now offers hiking, diving and snorkeling within Togian Islands National Park.
Visitors guide
Visitors can expect a remote volcanic island dominated by Mount Colo, with black volcanic sand beaches, coconut groves and small fishing villages. The coastline offers clear water, coral reefs and dive sites accessible by boat. Inland, trails lead toward the volcano crater through regenerating vegetation. Accommodation is in simple homestays and dive lodges, with boat-based exploration to surrounding reefs and islands within the Togian Islands National Park.
Key highlights
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Mount Colo active volcano and trekking trails to crater area
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Coral reefs and dive sites around Una-Una with rich marine biodiversity
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Dark volcanic sand beaches and distinctive volcanic landscape
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Part of Togian Islands National Park archipelago in the Gulf of Tomini
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Small Bajo and local villages with traditional fishing culture