Lesvos Geopark: The Petrified Forest and Beyond
A whole-island UNESCO Global Geopark of fossils, volcanoes, faults, springs and living landscapes.
The Lesvos Island UNESCO Global Geopark covers the entire island. Its best-known feature is the Petrified Forest, but its story also includes volcanic centres, hot springs, faults, wetlands, trails and traditional settlements.
Lesvos Island has been recognised as a UNESCO Global Geopark since 2015. The designation covers the whole island, not only the Petrified Forest, and connects geology with ecosystems, settlements, local products, education and sustainable travel.
The Petrified Forest
The forest formed when volcanic material rapidly buried a subtropical ecosystem roughly twenty million years ago. Silica-rich fluids gradually replaced organic tissue, preserving trunks, roots, branches, leaves and other plant material in remarkable detail.
Managed parks around western Lesvos allow fossils to be seen in place. The experience is strongest when visitors understand the forest as an ecosystem and geological event, not as a collection of decorative stones.
The museum in Sigri
The Natural History Museum of the Lesvos Petrified Forest presents the fossils, the evolution of the Aegean and the volcanic history of the island. Real-time seismic information, educational spaces and an earthquake simulator make it a research and learning centre as well as a visitor museum.
Volcanoes, faults and hot springs across the island
The geopark includes volcanic centres such as Lepetymnos and Vatousa, lava structures, faults, mineral sites and thermal springs. This wider framework explains why western Lesvos looks so different from the olive-covered east and why hot water emerges at Eftalou, Polichnitos, Lisvori, Thermi and other locations.
Walking the geosites
The Lava Paths connect fossil parks, Sigri, Eresos and other western geosites. The island-wide trail network adds routes through forests, wetlands, villages and cultivated landscapes. Use official maps but verify current route condition and access.
A family learning landscape
Children can move from museum models to fossil parks, experiment with excavation methods in educational areas and learn earthquake preparedness through the seismic bank. Programme availability varies, so contact the museum when a specific activity is essential.
How to visit responsibly
- Never remove fossils, rocks or archaeological material
- Use managed parks and marked paths
- Carry water and sun protection in western Lesvos
- Avoid climbing on exposed fossil trunks
- Follow fire-risk and weather restrictions
- Support local villages and museums rather than treating geosites as isolated photo stops
A useful western sequence
Kalloni – Vatousa – Antissa – Sigri – Eresos forms a powerful road journey from fertile central landscapes into the volcanic west. Two days allow time for the museum, one fossil park, village walks and the long beach of Skala Eresou.