Today we visited Wind Cave National Park, the first national park to preserve a cave system. The cave is unique because it contains 95% of the world's boxwork, an unusual calcite formation.
We went on the two-hour Natural Entrance Tour, which includes 350 steps (mostly down). Our tour guide was ranger April. This is her third season here. She told us about doing some caving on her day off (16 hours crawling through caves). She found a wonderful room full of frostwork, which looks like icy crystals. She realized that she was the first human being to have seen this room. Much of Wind Cave remains unexplored.
After looking through the exhibits, we picnicked near the Visitor Center and then headed out to drive part of the Custer State Park Wildlife Loop. We saw bison and pronghorns and prairie dogs.
We did come upon one unusual "animal jam"--a group of begging burros. They are not native to the Black Hills, but were introduced to carry tourists up Harney Peak.
Fire also thins dog-hair thickets (small, closely spaced pine trees) and makes room for forbs (broad leaf plants), the preferred diet of many prairie dwellers, like prairie dogs. (See how travel enriches your vocabulary!)
We stopped to get diesel and some groceries, so we were really late getting home. Another long day of sightseeing--we need some time off soon.
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