The watchtower of Torre de la Sal Rossa is one of the oldest on the island. It arises at the end of the beach of Ses Salines.
More information at geocaching.com http://www.geocaching.com/seek/cache_details.aspx?guid=404dd453-d637-4ec4-9c73-21c6fa551bfd
Address 07830, Spain
Coordinates 38°52'24.082" N 1°24'14.498" E