This scenic highway provides access to the Timpanogos Cave National Monument, and is a gorgeous route through this area. It winds through aspen forests, with breathtaking views of the Wasatch Mountains. It is also the entrance at its southern end to the Sundance Resort. If you want to hike up to Timpanogos Cave, be sure to check their website, as advance reservations are recommended.
If you go:
There is a recreation fee of $6 per vehicle, and the road is only open from late May to late October,depending on weather. Access to the road from I-15 is easy using Exit 272 from the south or Exit 284 from the north.
Links:

UT-92
Provo, Utah 84604 USA
Mailing address:
Heber Valley Vistor Center
475 North Main
Heber City, UT 84032 USA
Phone Numbers:
Pleasant Grove Ranger Station
+1 (801) 785-3563
+1 (801) 785-3563