Aptly named fort-like rock formation. Absolutely worth a visit if you're traveling on OR-30 and for me it was worth the hour drive from Bend. I was the first one there in the morning and was immediately struck by how dead silent it was (maybe it was because there was no wind). I ended up walking the full interior path and inspecting some of the more interesting formations. Kids would love this place. There was ample parking and running water, but when I was there the men's room was pretty gross, but they are working on it, so I used the women's room, but there was also a portable toilet, so I can't complain. I'd love to come back here again.