| Bwang |
I had to drag characters through the Citadel at least 6 times, it reaching the point that I was drawing out chambers before the GM could describe them (Yeah, he was that bad).
I would set it near the Mana Wastes, a forgotten stronghold 'destroyed' by rampaging Earth elementals. Now concealed by the ruble of runaway elementals, the ruins could be difficult to find.