My Mirror Worlds campaign is a fun jaunt through alternate realities for a single group of players. Based on Robert Jordan's the Wheel of Time, it offers a lot of options to the players that I try to keep restricted based upon the world they're in at the time.
The players just recently finished the first arc of the campaign that took them from level 1 up to level 17 in the case of the highest level player. You can find some of my thoughts on the campaign below, and I will hopefully be enhancing this website as I have the time.