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Tell me more, I’ll get better.
Sign up and I'll remember your taste, your people & your saves.
© 2026 Go Playfully Inc
🚂Little train takes you deep into the galleries
🔬See seismic sensors and clean room facilities
📞Book ahead - only open Heritage Days mid-September
Explore four kilometers of underground tunnels carved through a mountain, where a Cold War military bunker now houses active seismology and hydrological research.
Former military site
Underground research tunnels
Seismic measurement labs
Cold War history
🚂Little train takes you deep into the galleries
🔬See seismic sensors and clean room facilities
📞Book ahead - only open Heritage Days mid-September
Explore four kilometers of underground tunnels carved through a mountain, where a Cold War military bunker now houses active seismology and hydrological research.
Former military site
Underground research tunnels
Seismic measurement labs
Cold War history