A true hidden gem in Buenos Aires lies beneath the surface: the mysterious underground tunnels of El Zanjón de Granados in San Telmo. This unique site offers a fascinating glimpse into the city’s past and its evolution over the centuries, all brought to life through a professionally guided tour. In this article, I’ll explain why visiting El Zanjón de Granados is an unforgettable experience and provide details on when you can plan your visit. Read…