Madeira Caldeirão do Inferno", which should not be attempted by hikers prone to vertigo or without torches and helmets. The "Levada do Caniçal" is a much easier walk, running from Maroços to the "Caniçal Tunnel". It is known as the "mimosa levada", because "mimosa" trees, (the colloquial name for invasive acacia) are found all along the route. Administratively, Madeira (with a population of 267,302 inhabitants in 2011) and covering an area of is organised into eleven municipalities: Funchal is the capital and principal city of the Autonomous Region of Madeira, located along the southern coast of the island of Madeira. It
Madeira River barges in Porto Velho, where both Cargill and Amaggi have loading facilities, and then shipped down the Madeira to the ports of Itacoatiara, near the mouth of the Madeira, just upstream on the left bank of the Amazon, or further down the Amazon, to the port of Santarem, at the mouth of the Tapajos River. From these two ports, Panamax type ships then export the grains - mainly soy and corn - to Europe and Asia. The Madeira waterway is also used to take fuel from the REMAN refinery (Petrobras) in Manaus, state capital of Amazonas, to Porto Velho, from