As a child, Gary Gygax used to wander the empty halls of the abandoned Oakwood Sanitarium in Lake Geneva, forming the ideas that would eventually become the Dungeons & Dragons tabletop fantasy role-playing game.
Lake Geneva is not only the birthplace of D&D, it also served as the headquarters of TSR, the company that Gygax formed with Dave Arneson to publish the game. TSR operated out of Gygax’s basement at 330 Center St until they opened The Dungeon Hobby Shop.
The first Gen Con was held by Gygax in 1968 at the nearby Horticultural Hall.
Gygax died in 2008 and is buried in Oak Hill Cemetery.
A memorial brick around the Riviera Ballroom fountain on the shore of the lake is dedicated to Gygax, engraved with a dragon atop a d20 polyhedral die.