Kendall Warm Spring
The spring's warm water supports a unique fish species known as the Kendall Warm Springs Dace. A small waterfall isolates the dace from the closely related Green River dace. The two-inch long fish are particulalry striking during the summer months.

Periodic Spring
This is a unique cold-water geyser located in Swift Creek Canyon 5 miles east of Afton. During late summer the flow of clear, ice-cold water cycles on and off at 18 minute intervals. The water gushes out of a ledge and cascades down a steep hillside.

Tie Hack Sites
Cutting timber to produce railroad ties was known as tie hacking. Evidence of this activity, including abandoned cabins, can still be found along the Green River, the Hams Fork River, and in the mountains.