In arathi highlands near Hammerfall is a cave with kobolds in it. This cave is a great place for mining iron and mithril AND earning cash -
It has 9+ spots for mithril, bloodstone and iron.N ot only that, these deposits respawn VERY fast and are VERY easy to spot - If you stand in the middle of cave you can see most of the ore eposits as soon as they spawn... I have earned loads iron bars there by now and 200 mithril in
1 1/2 hours
Its a good place and I advise those engineers needing mithril to go there.
It also has a 30 min chest spawn with 2 green items in (usually) and some other stuff.