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Rinjani-Lombok UNESCO Global Geopark
Segara Anak lake and the young Barujari cone inside the Samalas caldera

Rinjani-Lombok UNESCO Global Geopark

A living landscape, read through its rocks

In 1257 the Samalas volcano erupted with a force felt around the world. Its caldera, Mount Rinjani and the land around them have been a UNESCO Global Geopark since 2018.

2018
Designated a UNESCO Global Geopark
2,850 km²
Geopark area across Lombok
47
Geosites: 22 geological, 17 cultural and 8 biological
2026
Green Card certificate received at UNESCO, after the 2025 revalidation

The eruption that buried a kingdom

Samalas was a volcano that stood beside today's Mount Rinjani. When it erupted in 1257 it collapsed into the caldera that now holds Segara Anak lake. Ash and pumice buried the City of Pamatan, the seat of an old Lombok kingdom, and sulphur from the eruption reached the ice at both poles.

The Geopark tells this story through the places where it can still be read: the caldera rim, the new Barujari cone rising from the lake, the pumice deposits, waterfalls and caves on the slopes, and the volcanic beaches on the coast.

The Samalas caldera seen from the crater rim