Map with bosses and skyshard location in Village of the Lost public dungeon in Coldharbour. Both quests are picked up in the first area and hard to miss. Last two bosses including Group Challenge (marked with red asterisk) are underground just past a few clanfears (entrance marked with red circle). It’s recommended to finish these bosses first before turning in the main dungeon quest, as it will teleport you to the very start of the Village.