Madeira all points of interest on the islands. Funchal has an extensive public transportation system. Bus companies, including Horários do Funchal which has been operating for over a hundred years, have regularly scheduled routes to all points of interest on the island. Folklore music in Madeira is widespread and mainly uses local musical instruments such as the machete, rajao, brinquinho and cavaquinho, which are used in traditional folkloric dances like the "bailinho da Madeira". Emigrants from Madeira also influenced the creation of new musical instruments. In the 1880s, the ukulele was created, based on two small guitar-like instruments of Madeiran origin,
Geology of Madeira to the end of the Pleistocene ice ages means that some Quaternary marine terraces are as much as 100 meters above sea level. Groundwater on Madeira is held in fractured volcanic rock aquifers, with widely varying transmissivity and dissolved mineral content. Water is generally slightly acidic to slightly alkaline and cold, although there are small quantities of thermal water near fault zones. Much of the water on the island comes from high-discharge springs. Leptosols, cambisols and andisols are the three main soil types on the island. Madeira has few natural resources and no mining, aside from small-scale extraction of sand