This is a guide for the "Disembodied" - Quest you get from Juli.
How to Obtain Grave Robber Achievement
You can find Juli at the entrance of the "Elysian Fields"
You can find the Grandma's tombstone at the entrance/below of The Pass of Alphara.
You can find the Gambler's tombstone at the first Inn you can rest at
You can find the tombstone "buried in flesh" at the cliff in Heretic's Trail