What is the importance of the Adirondacks in the novel, Mr. Splitfoot?

Mardellion set up his cult in an abandoned mine area in the Adirondacks. The location is incredibly remote, with the nearest town miles away, forcing travelers to cross a rickety old wood bridge in order to get up to the property. There is a large and beautiful main house built of stone and several small cabins down by a nearby lake. Mardellion built a huge, grand temple for his followers to worship.