17 Islands Marine Park (Taman Wisata Alam Laut 17 Pulau Riung)

17 Islands Marine Park, known locally as Taman Wisata Alam Laut 17 Pulau Riung, is a marine nature tourism park off the north coast of Flores in Riung, Ngada Regency, East Nusa Tenggara. It comprises 17 small islands with white-sand beaches, coral reefs, mangroves and clear waters. Notable for snorkeling, island-hopping boat tours and the large flying fox colony on Ontoloe Island, it is managed as a protected marine tourism area.

Visitors can expect a boat-based island-hopping experience from Riung harbor across calm, clear waters to small uninhabited islands with white sandy beaches, shallow coral reefs and mangrove fringes. Areas to explore include beaches for swimming and relaxation, snorkeling spots with reef fish and corals, and Ontoloe Island to observe thousands of flying foxes roosting in mangroves. Facilities are basic and most time is spent on boats and beaches with local guides.