[Edi]

Some clarifications on above list:

• P10 This power could be extra resource bonus for castles built in this province. It used to be in DomPPP that Forges of Ulm generated extra resources, but in Dom2 that was changed for Ulmish castles to get a resource bonus. This is presumably a similar effect that anybody can get the benefit of if they build a fort on top of a Mine of Superior Iron.
• P16 This does indeed generates temples when found. It can hardly be anything else. Dom2 had a common unholy site named Unholy Temple which produced a temple on discovery. It was mainly only useful for Ermor and was removed in Dom3 when all unholy sites became various other types of sites (mostly holy, death or nature).
• P21 Disease Argument is percentage of each unit getting hit with disease every turn they stay in the province.
• P24 Horror Mark Argument is percentage of each unit getting hit with a horror mark every turn they stay in the province.
• P67 Holy Power This is the power that only kills undead and results in the message "Your undead units in <province name> are being killed by a holy force native to this province." The argument is percentage chance of each undead unit being hit with dmg 10 AN magical attack.
• P68 Holy Fire This is the Holy Fire effect that produces message "Your undead and demonic troops in <province name> are being hit by holy fire". The argument is percentage chance of each undead or demonic unit being hit with dmg 10 AN magical attack.
• P71 Curse Argument is percentage of getting cursed every turn the unit stays in province.
• P192 Argument is probably percentage chance of actually getting something useful such as items out of this. Anybody who sends a commander into one of those sites should be prepared to kiss him goodbye. On a test map, my rainbow 4 spectral mage had a hard time getting out of them alive what with being hit by seevral damage-causing traps each turn and needing to fight horrors and void monsters in the Forgotten City and hordes of ghosts and other undead in City of the Damned.