More to explore:
Lava Tube Cave, Lava Beds National Monument, Tulelake, CA-- 1hr from crater lake
Underground garden, Lava Beds National Monument, USA. Lava Beds National Monument is located in northeastern California, in Siskiyou and Modoc Counties. The Monument lies on the northeastern flank of the Medicine Lake Volcano, with the largest total area covered by a volcano in the Cascade Range. Lava Beds National Monument has numerous lava tube caves, with twenty five having marked entrances and developed trails for public access and exploration.
13 Stunning Pictures of Wonderful Places: Lava Tube Cave, Tulelake, California,
Lava flowing into the ocean with steam plume, The Big Island, Hawaii.
The entrance to the Thurston Lava Tube at Hawaii Volcanoes National Park.
Belize cave tubing.. i did this once through a cruise i was on! coolest experience ever
Hart Lake - Mt Shasta National Park, California- gonna do a long weekend here soon!!!!
Ape Cave, Lava Tube | Mt. St. Helens, Washington. This place is amazing! Wear good shoes, jeans & bring flashlights. Be ready to climb!
Underground Lake - Ryusendo Calcareous Cave - Iwaizumi town - Japan - *explored* | Flickr - Photo Sharing!
Located at the southern end of Okinawa island, Gyokusendo Cave is the second largest series of caves in Japan and is considered to have the best stalactites and stalagmites in all Asia.
Into A Moss Grown Cave. - Its a Long Climb out. Caving helmets with lights, climbing gear, caving suits, and all the required equipment...
High bluffs on the most western edge of San Francisco | Fort Funston is one of the premier hang-gliding spots in the country
lava bombs - Eyjafjallajökull
Iceland ~ Hundreds of years of mist have covered the Eldhraun lava and tephra flow from the Laki fissure, East rift, in spongy moss and lichen. Formed in the massive "Laki fires" that killed 1/4 of Iceland's people 1783-1784 AD.
Sunset flowers at Post Ranch Inn, overlooking the cliffs of Big Sur, California.