A Google searchable map you may find useful.
By default the site's main menu ( normally shown on the left ) is hidden, just click on the blue 'Algarve' text to show it.
Click on the blue 'Question Mark' to the right of the map title to display help on the map controls.
Return to the Maps Page.
Don't forget to pick up a 'freemap' whist visiting the Algarve. They cover most major towns and are available most everywhere. Invaluable!