Macombopoly is the world's largest Monopoly board. It encompasses the historic Courthouse Square of downtown Macomb, Illinois, and is facilitated through a mobile application developed by eATLAS, a platform specializing in digital tours and scavenger hunts. The interactive experience guides participants around the Macomb downtown square to various landmarks, where they engage with local history and trivia. Gameplay involves completing specific objectives, such as locating monuments and capturing photographs. Participants may compete as individuals or in teams of up to five, with successful completion of tasks potentially yielding prizes. Macombopoly was officially unveiled on May 9, 2024, on the birthday of Lizzie Magie, who was born in Macomb, IL and is credited with inventing The Landlord's Game in 1903, which eventually evolved into Monopoly. The game's first ever board was modeled after the square in downtown Macomb.