Lighthouses and Lime Kilns

"There are many lighthouses in the Canary Islands and locals and many visitors will know that there is a particularly fine one at Maspalomas in Gran Canaria. The lighthouse, or Faro in Spanish, helps sailors to navigate their ships and is an integral part of sea-life. Usually, they are cylindrical towers with a light on top, and emit a fixed sequence of beams that is unique to a particular lighthouse. Built in 1980, the Maspalomas lighthouse is still operational and, for those who like full details, provides 3 white flashes every 13 seconds. Before lighthouses were invented, sailors were warned of hazards by the lighting of fires along the coastline..."
www.barriemahoney.com and www.thecanaryislander.com