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"Do Not Enter" sign at closed section of Thurston Lava Tube in Hawaii Volcanoes National Park, Big Island, Hawaii
"Do Not Enter" sign at closed section of Thurston Lava Tube in Hawaii Volcanoes National Park, Big Island, Hawaii
  • Big Island
  • Do Not Enter sign
  • Hawaii
  • Hawaii Volcanoes National Park
  • Mike Krzywonski
  • Thurston lava tube
  • cave
  • cavern
  • closed
  • ferns
  • foliage
  • lava tube
  • no access
  • restricted
  • rights managed
  • stairs
  • steps
  • tunnel