I took a couple friends up to the Mauna Loa Observatory where I work on June 11, Kamehameha Day (a state holiday here in Hawaii) for a tour of the YTLA and some exploration of various lava tubes and geological features. For a state holiday, it was the busiest I've ever seen it up there, with both a tour group from South Korea on a tour and people around from both the eponymous atmospheric observatory and the Mauna Loa Solar Observatory, which I'd never actually noticed being open before (though I discovered they were likely the car we'd meet driving up at 4:00 AM as we were driving down after a night of observing!).
|The telescope at the MLSO, observing the sun.|
|My friend Mark provides scale for the opening to this particular tube.|
Once inside, I was pleasantly surprised to find that there were several large skylights at irregular intervals for some way, lighting it up to the point where a flashlight was hardly necessary at all.
|A little hard to make out, but this is looking down the tube.|
|Gypsum-coated walls reflect enough light that this picture actually worked.|
|A skylight with a natural bridge crossing the tube.|
Despite what these pictures might make you think, we actually didn't get to fully explore the tube to my satisfaction; after a while the skylights stopped while the tube continued on, but as it was still crummy weather and starting to get a bit late we didn't continue on (I've heard the cave continues on a bit further before ending). I definitely plan to return, however! It's a really cool cave, and I plan to go back with my camera and a proper flashlight to plumb it to its end (we originally just planned to pop in and take a quick look due to the weather, which turned out to be closer to half an hour). A hui hou!