The Well of Wonders and Lake Nostos are entirely polar opposites (except for their regenerative powers in the water and that both locations' guardians come out of the water vertically). For example: one is a small well and the other is a vast lake. One guardian is ugly and the other is not. Nyx tried to warn the Cyrus, Taj, and Rafi when the Siren was seductive. What do you think their connection is to each other?