The Forum Boarium is across from the famous Mouth of Truth (Bocca della Verità) at the Church of Santa Maria in Cosmedin, but it’s often skipped by visitors as the temples are behind fences, so can only be seen from the outside. Consider joining a private guided tour of the “secret” sights of Ancient Rome to explore the temples up close, along with skip-the-line access to the more famous archaeological sites dating from the Roman Empire, including the Colosseum and Roman Forum.
This commercially strategic market along the Tiber river was a major center of livestock trade as far back as the third century BC, and occupied a central location between Ancient Rome's Aventine and Palatine hills, along with the nearby Forum Holitorium produce market. Today, visitors can see the Temple of Portunus (Temple of Fortuna Virilis) from the first century BC and the Temple of Hercules Victor, ringed by a 20 columns. The Forum Boarium is also home to the Arch of Janus, dating from the fourth century.