Grandville started as a small pirate town, but grew large and prosperous in the 1950s. Without room to expand, new structures were built atop existing ones. Fortress-like in nature, Recluse choose it to be the site of Spider City, his new capital. In the center he built his Watchtower, and the WEB around it, a tangle of steel that connects the tallest structures. In the Watchtower one can find Lord Recluse himself and all his lieutenants. It is also the site of his time travel experiments.
Down in the Gutter one can find infestations of Arachnoids, a failed supersoldier project. Crey Corporation has a strong presence on the island and can be seen trying to study these failures, and stealing other Arachnos technology. The Circle of Thorns also attacks Arachnos here, but are easily beaten back.
From time to time an Arachnos Flier will launch from the Watchtower and drop patrols off on the beaches, its firepower is sizable.