Lord Recluse's tower in Grandville is quite the imposing sight. In a bold statement of the despotic leader's confidence, the tower is even open to the general public as an administrative building, and Recluse is even available should anyone seek an audiance with the de facto leader of Arachnos. Come! See the splendour of Grandville from the (surprisingly) safest place there: Arachnos Headquarters.
Note: Grandville is a level 40+ zone, but the interior of the Grandville Tower should be free from any enemies.