Location: From I-64, take US 37 south about six miles, then turn left at Co. Rd. 166A. From its intersection with Old SR 37 (the first crossroad you come to) it is 1.2 miles further; then turn left onto an unmarked and narrow gravel road (an old driveway, from the looks of it), which enters the property in less than a quarter mile. The preserve is to the west and south and is unmarked.
Description: Sandstone cliffs, waterfalls, rock formations, wildflowers, creek, rare plants. Enough said? Probably better in spring than in fall, when I visited. Entering the hollow you are going downhill; save some energy for the return trip. I believe that I actually visited this area, but I didn't go far enough in. As you will see if you check out this field report from Jordan Dauby (yes, some relation!), the area borders on being spectacular. Remember that this is a nature preserve; be good to it.
Nearby Points of Interest: Boone Creek Barrens, Saalman Hollow, Hoosier National Forest. This is part of the Shooting Star Cliffs Special Area of the Hoosier National Forest.
Cautions: Ticks. Be sure to use repellent and to check for ticks, preferably with an intimate friend, after being out in the woods; this is particularly important in the southernmost counties of Indiana, where it is possible, although not likely, to pick up ticks with Lyme disease or Rocky Mountain spotted fever.
Ownership: US Forest Service.
(note: Picture copyright to Jordan Dauby)