If you're spending a day exploring Amelia Island, Amelia Island Museum of History is the kind of stop that rewards a little time.
Florida's first oral history museum, housed in the beautifully restored 1935 Nassau County Jail in the heart of the Fernandina Historic District. Exhibits span 4,000 years, from the Timucuan people through the "Eight Flags" era. The docent-led Eight Flags Tour runs at 11 a.m. and 2 p.m. Mon-Sat, and 2 p.m. Sundays. Admission $8 adults, $5 students.
The address (233 S 3rd St, Fernandina Beach, FL 32034) places it on a recognizable Amelia Island block, which makes it easy to build into a walking loop or a short drive from most of the island.
The venue reads as Museum, History, Eight Flags, Guided Tours based on its own positioning, which is a useful signal if you're trying to match it against what you're actually in the mood for.
For current hours, menu (or offerings), and anything else that changes season to season, the business's own site at https://ameliamuseum.org is the source to check; nothing on this page invents a detail that isn't on theirs.
Planning an island visit around attractions like this one pairs well with concierge service for restaurant reservations and transportation between stops.