The Tunnels of Guanajuato are an intricate underground network that stands as one of the city’s most remarkable engineering feats. Originally constructed in the early 19th century to control frequent flooding caused by the Guanajuato River, the tunnels transformed from essential flood channels into vital transportation routes. Their adaptive reuse began in the mid-20th century when modern flood control systems were introduced, allowing the tunnels to become the city’s primary roadways. With a rich colonial history shaped by silver mining, these tunnels reflect Guanajuato’s ingenuity and resilience. Stretching beneath the city’s narrow, winding streets, they connect key areas and provide a unique perspective on urban planning from the colonial era. The tunnels not only offer a glimpse into Guanajuato’s mining and architectural past but also contribute to the city’s UNESCO World Heritage status, making them a fascinating educational experience for all who visit.