The Fermi National Accelerator Laboratory (Fermilab) conducts leading-edge physics research. The mysteries of nature are explored at Fermilab on a 680-acre site that is home to the world’s largest particle accelerator. APA developed an interpretive master plan for Fermilab to meet the needs of all visitors to the site, from school children to Nobel Laureates, while maintaining a level of security befitting a laboratory of this caliber.