Levada da Serra do Faial
The Levada da Serra do Faial once brought water to the Caminho do Meio - the old road on which the Botanical Garden is located - from the Levada do Furado which flows through Ribeiro Frio. The initial section from Funchal was abandoned (though the footpath remains) and the water diverted down a new downhill course to the Levada dos Tornos when the latter was constructed. Beyond Camacha, significant sections are now road or footpath. Being at a relatively high elevation, you can experience either magnificent distant views or an obscure blanket of low cloud - or alternating periods of both!
The walk described here is the section between Funchal (Caminho do Meio) and Camacha (Estrada dos Casais de Além). You can go beyond Camacha to Santo da Serra or even Portela/Ribeiro Frio.
As mentioned, there is no sign of water along the initial stretch of the path, nor of the levada ever having existed, though if you're fortunate with the weather there are, by way of compensation, views of Funchal. There was significant logging going on when I visited recently, meaning the uphill areas were rather bare. The valley immediately below is used for agriculture.
As you turn away from Funchal, you can see across to the gardens of the Quinta do Palheiro.
Continuing in the direction of Camacha, you have views of the Quinta do Palheiro, from the opposite side.
There are also constant signs of the agriculture supplied by the waters of the levada.
Getting therethe point at which the road is crossed by the levada. There is now a small area of car parking giving you the option to park and head either towards Camacha and beyond or towards Funchal. The entry point to the levada in Camacha is on a narrow road used by buses and coaches so not ideal for parking. There is parking in the centre of Camacha but it's a steepish hike up to the levada.
If you want to start from the Funchal end, there is (paid) parking at the Estádio da Madeira which appears to be open to the public and from where there is an exit directly onto the Caminho do Meio, though there is still a significant climb up to the start of the levada. See the directions below for getting from the Caminho do Meio to the start of the levada.
From Funchal, you'll have a climb of about 200m over a distance of around 1km from the nearest practical public transport, so if you prefer to walk downhill, make this the endpoint of your journey.