Starting at Travessa Santa Rita in Paraty's Centro Histórico, you'll open the Explorial app, enter the 6-digit game code that you received by text and Viator chat message, and set off into one of Brazil's best-preserved colonial towns. No guide, no fixed start time. Your first landmark is the Igreja de Santa Rita de Cássia, built in 1722 and the oldest church in Paraty. Its bright white facade rises above the cobblestones, and the riddles reveal the stories behind its founding. The route leads next to the Cais de Paraty, the old stone quay at the water's edge. Gold mined in Minas Gerais once passed through here on its way to Portugal — the app walks you through its remarkable history. The hunt ends at the Casarão dos Símbolos, a colonial mansion whose walls are carved with Masonic symbols and cryptic imagery that historians are still debating. It's one of Paraty's most curious sights. Plan for around 2 hours at an unhurried pace. Paraty rewards slow walkers and curious eyes — this tour brings out the best in both.