Nature preserve and an experiment

Here are some pictures from a nature preserve place outside of San Marcos. I can't remember the name, but we passed by a walkway over a swampish area and there were these cool...things. There weren't descriptions around them, so I don't know if they are supposed to collect water or what.

Also, I'm blogging these photos directly from Picasa 2. This may be a way to post photo collections, but if it comes out like I think it will, there won't be a link to the photos but all the photos will be there. This may not work if you want to have a link to a published photo collection elsewhere than on your front page.