No, there are no instanced zones specifically designed to be soloed.
What you were reading about was about a specific zone that everyone has to do when they do the class and sub class quests. In part of the quests, you have to perform something in this instanced zone by yourself.
Remember, EQ2 is primarily designed for groups. There is a small amount of solo content but not awhole lot.
Edited, Mon Nov 8 23:38:29 2004 by WiscoPlayer
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Voelfgar Fireforge
105 Beserker
Mangler