Gates

Gates are pathways that lead to realms other than Ouran, and the smaller worlds in-between. Thery aren't supposed to exist in so many places on Ouran and are usually sealed, but more and more gates have been opening in different places. On maps, a gate is represented by this triangle symbol, Δ.

Locations
The Red Book is said to contain knowledge on how to tear the gates open and even create completely new gates.
 * Nightgate
 * Aarinvah
 * Khesii
 * Greyspell