I found an interesting guide to ALL the puzzle and cairn locations in the game:
http://www.kfguides.com/rift/puzzlesguide.php
It also gives the maximum level of gear you can get from each (gear from them scales, but only to a certain point) so you can figure out the optimum time to get each (if you're a min-max type).
Spoiler Alert: Do NOT read this guide if you prefer to find these things and solve the puzzles on your own. I'm using it mostly to see what I "missed" in zones I think I've completely gone through. So far, I'm doing pretty well. :-)
Edit: More BBCode goofs
» Edited on: 2011-03-05 09:58:54