The territory of Panamá is crossed throughout its length by a series of mountain ranges divided by a central depression, where was built the Panamá Canal, north of the canal is the Cordillera Central where is the highest mountain in the country, Barú Volcano (3,474 meters), beyond the canal, towards the border with Colombia are the mountains of the Cordillera de San Blas and Serrania of Darién. Panamá economy has its main source of revenue from the Panamá Canal, but the country is also an important financial centre, fisheries (crabs) are very important, Panamá has one of the largest merchant fleets of the world. Agriculture produces bananas, coffee, cocoa, maize, rice, potatoes, cassava, tomatoes, sugar cane and tobacco, while farming is concentrated mainly on cattle, great importance has the exploitation of forests.