Arco de Jano Augusto Curiosity · Mengíbar, Área Metropolitana de Jaén, Jaén Image of Mengíbar, not of the place itself. According to local tradition, a Roman arch dedicated to Janus Augustus marked at this point the boundary between the provinces of Baetica and Carthaginiensis. Photo: Veinticuatro de Jahén (CC BY-SA 4.0) What to see and do in Mengíbar