Adventures in caving, or spelunking

My favourite hobby by far is caving. It's a little bit more challenging than the hiking, and scrambling I normally do. Caves are very fascinating to me. Recently, I explored the ape caves at Mt. St. Helen's national park. The caves were chilly, and damp. Moss covered everything, which is classic for Washington state. These caves are a little different from traditional caves that are carved out by water mostly. These caves are old lava tunnels. You can still see where some of the lava flowed out of the rocks, and solidified. It was a intresting experience climbing over rocks, and crawling through tunnels. I got a little banged up, and muddy, but it was a fun adventure. I especially liked the way the light came down from openings in the ceiling, and made the place look even more enchanting. Any one else been caving?