Treasure Maps, obtaining treasure

I just wanted to relate the process!

1. I received a few treasure maps from attacking devils/harpies/merman troops.
2. I went into the Neutral City, Identity Chamber and paid gold to have the map assessed.
3. They gave me a coordinate where the treasure was to be found.
4. I sent a hero, with a goodly # of troops (703)
5. There was a battle with the defenders (23) and I gained 3 Army Supplies, lost 3 troops.
6. Automatically the Treasure Hunt occurred; they found a "Exp Book I", now sitting in "Items".
(I gather that this gives 500 Experience points to a level 1 hero, which I don't have at the moment)

was worth that? i mean to pay for 500exp book O.o

last time i payd 1000 gold to identify a map,
i sent my hero, so far.. like 6h to reach the coordinate...
i get a 3k xp book usable after lvl 21.
dunno.. 6 hour = lots of adventure and or raid and or xp killing some pets around

what neutral city do i go to..or how do i find one...i have lots of maps