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Caerano di San Marco, or simply 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, known as Montelletto and locally as the Rive di Caerano 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. This is in particular the Canale di Caerano, better known as Brentella (Brentèa), a branch of the Brentella di Pederobba.