The Monument to Grom Hellscream is located in Demon Fall Canyon of Ashenvale. During Harvest Festival, Javnir Nashak asks the adventurers to honor Grommash Hellscream by placing offering at the monument's base.
In many ways, the curse of our people began and ended with Grom.
His name meant 'giant's heart' in our ancient tongue. He earned that name a hundred-fold as he stood alone before the demon Mannoroth - and won our freedom with his blood.
Lok'Tar ogar, big brother. May the Warsong never fade.
-Thrall, Warchief of the Horde