Diano Castello is a comune (municipality) in the Province of Imperia in the Italian region Liguria, located about 90 kilometres (56 mi) southwest of Genoa and about 5 kilometres (3 mi) northeast of Imperia. As of 31 December 2004, it had a population of 2,061 and an area of 6.0 square kilometres (2.3 sq mi).
Diano Castello borders the following municipalities: Diano Arentino, Diano Marina, Diano San Pietro, Imperia, and San Bartolomeo al Mare. The hills surrounding the village are covered with olive groves and with vineyards that produce Vermentino, a white wine.(Wikipedia)