The tree known as 'Oliveira do Mouchão', found in the municipality of Abrantes, is thought to be the oldest in the country at 3,350 years old. It is an olive tree and "a contemporary of the Phoenicians, Celtiberians and Romans". According to UTAD, at the beginning of 2022 it was still "producing olives as if in the flower of youth, despite a trunk gnawed away by the ravages of time".