Travel Guide to Abra de Ilog, Occidental Mindoro, Philippines Abra de Ilog, which simply means “opening of a river,” is a serene and quiet town that serves as the only gateway to Occidental Mindoro. Probably what makes the town busy and noisy in a day is when a RORO ship docks in its port, carrying with it hundreds of locals and tourists alike eager to visit what Occidental Mindoro has to offer.