The pinnacles are one of the many spectacular features at Crater Lake National Forest in Oregon that get overlooked.

They were actually fumaroles that formed before Mount Mazama's  catastrophic caldera forming eruption. The heat caused these features to solidify and remain after the soil eroded from them.

If you ever get a chance to see Crater Lake, go! You might want to stay a week and hike all over the park.

Another way of using this word is as follows: Stephen King and Steven Spielberg are at the pinnacle of their careers.