Point of the mountain is just that.....the place where the south end of Salt Lake County meets the north end of Utah county. The southernmost city in Salt Lake county along I-15 is Bluffdale, the northernmost city in Utah county along I-15 is Highland I think....or it could be Cedar Hills or Alpine. The point of the mountain is also a known place of possible bad weather (blowing snow, strong winds).
The
spaghetti bowl, is the area where I-15, I-80 and Highway 201 intersect with various collectors and on/off ramps. Interstate 15 went through a major reconstruction to prepare for the winter olympics of 2002. It was in need of repair/revamping anyway. The olypmics just gave us federal funding to help with the cost. During the reconstruction, I think some of those ramps were reconfigured.
The north interchange is where
Interstate 215 intersects with Interstate 15 at the north end of the Salt Lake Valley.
Here's a map of the Salt Lake valley showing some major roads. Use the arrows and zoom features on the Google map to look around.
Hope this helps.