Caerano di San Marco, sometimes simply known as Caerano, is a town with 7,813 inhabitants in the province of Treviso. The territory is largely flat, with altitudes ranging from 91 m a.s.l. at 144 m. The landscape is characterized by the presence of a small relief, a natural continuation of Montello, located north-east of the municipality. The area is naturally poor in waterways, but the water supply has been ensured since ancient times by a system of artificial canals deriving from the Piave.