From WoWWiki

The Noxious Glade is a secluded glade found in the Eastern Plaguelands just north of Light's Hope Chapel up a hill. The glade suffers from the blight of the Scourge and is even more tainted then the surrounding Plaguelands. The air of the glade is a thick, sickly green and the ground is a dark purple. A plague cauldron and a few ziggurats are found within the glade, as well as several Scourge mobs. The mobs inhabiting the glade are levels 57-60.

Subzones of Eastern Plaguelands

Blackwood Lake • Browman Mill • Corin's Crossing • Crown Guard Tower • Darrowshire • Eastwall Gate • Eastwall Tower • The Fungal Vale • Hall of Arms • The Infectis Scar • Lake Mereldar • Library Wing • Light's Hope Chapel • Main Hall • The Marris Stead • Mazra'Alor • Northdale • Northpass Tower • The Noxious Glade • The Pestilent Scar • Plaguewood • Quel'Lithien Lodge • Scarlet Base Camp • The Scarlet Basilica • Stratholme • Terrordale • Terrorweb Tunnel • Thondroril River • Tyr's Hand • Tyr's Hand Abbey • The Undercroft • Zul'Mashar