Yes, most of them are hidden like the one on this picture. You'll find a number of easily accessible ones near Dahn and Erfweiler but you can bet that they will be very crowded. Better hike for a while and climb one of the hidden ones.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe