Interactive 50-state rockhounding map, locations, rules and field guides
REVIEWED LOCATION
Nisyros Volcano — Stefanos Crater Geosite Rockhounding Status & Field Guide
Stefanos is one of Nisyros’s signature phreatic craters, within a volcanic landscape interpreted through geosites, geotrails and the island’s Volcanological Museum. It is a look-and-learn location, not a specimen-removal pin.
Protected / viewing statusVery high evidenceviewpoint map precisionCurrent review cycle freshnessImportant: Do not leave marked visitor areas or remove rocks; national volcanic-route guidance explicitly favors photographs rather than rock souvenirs.
What is here
hydrothermal phreatic crater with sulfur-bearing volcanic terrain
Materials / interest: Volcanic Rock, Sulfur
Collecting and access
Volcanic-geosite viewing only. Current national visitor guidance for the Aegean volcanic route says rocks must not be removed from their natural setting.
Use the official crater visitor access and remain on designated paths. Check local accessibility before visiting.
Detailed status
viewing
Permission
Not flagged
Permit
Not flagged
Fee
Required
Guide
Not flagged
Booking
Not flagged
Surface collecting
no
Hammering
no
Digging
no
Safety
Active hydrothermal terrain: volcanic gases, heat, unstable ground and falling-rock risk can occur.