The Greatwyrm's Brow was a mountain range, so named as it stemmed across the "fore" of the Head of the Greatwyrm to the Body of the Greatwyrm. Spanning thousands of miles, it contained the subranges of the Snoutridge and the Crowncrests far into the Sea of Clouds; cartographers debated if the Toror-Mir were an offshoot of the Brow, or a separate range entirely.
Some religious scholars believed that Greatwrym's Gullet was a divine opposition to Greatwyrm's Brow, as they divided the Common League from the Elthysi Sovereign and the Scycaen Imperium, respectively. The Gullet was generally lower and far more easily traversable than the Brow, however, save for the magical dangers of the Emberpeaks and Rimerise.