Starting at the Marco Zero area of Recife Antigo, Pernambuco, Brazil, 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 most historically layered old towns. No guide, no fixed start time. Your first stop is Marco Zero, the large circular mosaic at the heart of Recife Antigo. Built on an island where two rivers flow into the Atlantic, this is where the Dutch West India Company established one of the most significant colonial settlements in the Americas. From there, the hunt leads to Rua do Bom Jesus, a street barely changed since the 17th century. Home to Dutch merchants, Sephardic Jewish traders, and the first synagogue in the Americas, it carries layers of history few streets can match. The route finishes at the Igreja da Madre de Deus, a baroque church standing at the waterfront since 1715. Its ornate interior and battered exterior speak to every chapter of Recife's long past. The tour takes around 2 hours at an easy pace. Recife Antigo is small, dense, and full of stories — and this hunt brings all of them to the surface.