
Level 85 zones are the zones in which the highest level items (TC 87) can be found from both champion and unique monsters since 85+2 and 85+3 are both at least 87.

The Maggot Lair and Arcane Sanctuary in Act 2 have wider pathways.The 3 red portal zones in Act 5 (Abaddon, Pit of Acheron, Infernal Pit) have had their density increased by 40-50%, and Mausoleum & Crypt have had their density increased by 9%.Monsters drop items with item levels equal to their monster level, which influences the affixes and sockets those items can get.

A monster's level determines which treasure classes it can drop items from. Regular monsters have a monster level equal to the level of the zone they're found in and champion/unique monsters have a monster level that is +2/+3 higher than that.
