Keep your eyes peeled at Mercado Modelo — you're likely to find some unique curio among the stalls here. After you've had a good look at the wares, grab a bite to eat from one of the local food vendors.
You'll have no end of sightseeing choices when staying in Aracaju Centro. Mercado Modelo is a great place to kick off here, but there are plenty of other worthwhile spots to explore. Atalaia Beach, Aracaju Oceanarium, and Aracaju Municipal Market are near the community marketplace and will round out your day nicely.