An archaeological area located in Marino Laziale, it houses an ancient underground shrine dedicated to the mystery cult of Mithras, dating back to the 2nd-3rd centuries AD. Accidentally discovered during expansion work on a cellar, the site consists of a long tunnel carved into the tufa, leading to a ritual hall, at the bottom of which is a fresco depicting the oriental deity intent on sacrificing a white bull. The scene, called “tauroctonia,” symbolizes the salvation and fertility that the god offers to his worshippers. The Marino Mithraeum is one of only three in Italy that has preserved this rare kind of fresco, along with the Barberini Mithraeum in Rome and the Santa Maria Capua Vetere Mithraeum.