Since "The Waterfall" can refer to several popular topics, here are the most common guides to help you:
Talk to near the Baxtorian Falls (north of Baxtorian Outpost). The Waterfall
Return to the waterfall with the amulet and runes to complete the quest at the Chalice of Eternity. [Quick Guide] Waterfall quest Since "The Waterfall" can refer to several popular
None, though being at least level 15 Hitpoints is recommended to survive aggressive enemies. The Waterfall
Enter the tomb (bring no weapons or armor!) to get .
Find in the Tree Gnome Village dungeon to unlock Glarial's Tomb.