This should be an Earthcache. What an amazing place!! Park just off the forest road and you will find a small sign at the entrance to the trail that says Aberdeen Columns. Follow the short trail to a large rock slide area. At the top of the rockslide you will find the beauty to be seen. A Basalt Volcanic Hexagonal Rock Formation with beautiful yellow and brown colouring. Absolutely stunning. Well worth the drive and adventure to see this one.
The Cache you are looking for is a 3D printed model of this great formation.