In the northern San Rafael Swell, there is an area called the Little Grand Canyon. There is a float trip that winds through there and one can hike to some pictographs on the feature that is in the lower center of the picture.
Just a handful of miles from the eastern on/off ramp for Green River, UT is the Crystal Geyser. It's a bicarbonate geyser (not thermal) that began as a drill hole. It used to spout 130-140 feet, but a previous landowner partially filled it in, so now it only goes 8-12 feet.
In the Labyrinth Canyon WSA is the Bowknot Bend of the Green River. The bend is 8 river miles long, but less than 1/2 miles as the crow flies. There is a trail that goes over this notch, so if a boater can hike up and over & be picked up by their companions as they float down the river.
