AntAgonizer's Lair

This is the hideout of the AntAgonizer in the quest The Superhuman Gambit. This location is very close to Canterbury Commons, just to the North West. There's even a trail to follow, and a marker on your map if you have The Superhuman Gambit quest. When you arrive near the exterior, there are two ways to proceed. The first is through the rather obvious door, which will land you in "Canterbury Commons Caverns," and not AntAgonizer Lair. The caverns are mostly empty, but contain a few ants to fight and a decent number of frag mines to loot (or get blown up by, as the case may be). Follow the caverns through to the end, and you'll arrive at the front of the AntAgonizer's lair.

Alternately, on the top of the hill that the door is embedded in, there's a grate (ID=a5e88) which will drop you right into the back of the AntAgonizer's lair.