Shulchan Aruch O.C. 228:1 states that one should make a bracha Oseh Ma'aseh Breishit upon seeing moutains. However, 228:3 specifies that this should not be done for all mountains, but only those which it is apparent that they are unusual and that the Creators work affected them.
If I see these arches, hoodos or balanced rocks, they are not specifically mountains. However, it is clear that G-d's work has shaped them. Should I be saying a bracha on seeing any of these?
I assume that if the answer is "yes", that one bracha suffices for all of them. If so, I have mentioned 3 types of rock formations. Is there any preference as to which of these 3 I should make the bracha upon first?