30s Undead solo spot ideas?

[Rimitto]

Once you hit 35 you could do tower of frozen shadow. Great ZEM

30 undead though are a bit tricky.
I'm not sure what level they are, but I always hear about this spot in field of bone off the shores that has undead in it.

EDIT: oh yeah, there's always oasis spectres, or any of the spectres around the world really. Most of them are in open zones too, so fearing is effective.