The forgotten café where Fidel Castro and Che Guevara used to meet, a tribute to the city's ghosts, a mammoth in the metro, a cave transformed into a shrine, an underground parking lot with mosaics dating from 1930, a Baroque altarpiece made from papier mâché, a village based on the principles of Thomas More's Utopia, secret masterpieces of colonial art in rooms only open around two hours a week, the largest roof garden in Latin America, the photo on which the Oscar statuette is modelled, the first building in the world faced with a material that can trap urban smog, a road surface designed for praying as you walk... Far from the crowds and the usual clichés, Mexico City is filled with hidden treasures revealed only to the residents and visitors who leave the beaten path.

Mario Ya r is a history enthusiast and ruthless explorer from Mexico City. He graduated in Audiovisual Communication, organizes guided tours and has collaborated in publications such as Letra Roja, Time Out M xico and Atlas Obscura. Thanks to his wanderings, he is one of the few people who knows the fourth section of the Forest of Chapultepec, the phantom station of the subway and the tunnels of Coyoac n; in addition to establishing a close friendship with the manatees of Xochimilco and the giant rat of the Merced. He currently resides in Mexico City.