Sestima

Sestima is a fictional archipelago used in speculative fiction and worldbuilding guides. It comprises five major islands—Aroa, Vellis, Kirth, Numea, and Lora—and numerous smaller islets. The name derives from the Sestari language, meaning "meeting of waters." Located in the northern Crescent Sea, Sestima is noted for rugged coastlines, geothermal vents, and a strong seafaring tradition.

The archipelago spans a range of climates from tropical coastal zones to highland temperate forests. Its ecosystems include mangroves, cloud forests, and coral throngs. Endemic species of birds and marine life are protected in several reserves. Human settlement is clustered along harbors and river mouths.

Historically, Sestima was inhabited by coastal communities who developed boat-building and trade networks. In the medieval era it formed a loose confederation of islands, later negotiated with empires during early modern times. In the modern era, the Sestima Confederation acts as a semi-federal system with autonomous island councils and a central legislature seated on Numea.

The economy centers on artisanal fisheries, aquaculture, timber, and tourism. Cultural life blends Sestari and neighboring island influences, with bilingual education and a calendar of water-based festivals. Traditional crafts include mat weaving, carving, and knotwork.

Notable sites include the Dawn Gate, Emerald Port, and Sestima National Park, which protects coastal mangroves and montane forests. The archipelago features a network of scenic trails, ferries, and small-airport links.