I usually go to Gorgok's Cave. I'll tell you why.
Well, the drops are pretty good and the exp isnt bad either the worst drop sells for
200k and besides you get the chance of getting The REALLY Special Dragon Chow (rarest drop in-game) and the best drop (Gorgok's Scale i think sells for
350k.
Location: Just go to Willowshire and from there go to ''Return Of Gorgok?'' and u have to kill 3-4 dragon things ( dont know what they're called and I'm too lazy to check right now lol) then you have a little dialogue with Gorgok. WARNING: THIS IS A TITAN BATTLE!! So you need a DRAGON AMULET.
Here's a link that was LOTS of help for me. www.dfwiki.com--Solina