Today you can follow a traveller as he makes his way around Madrid. The places he visits will be determined by recommendation messages he receives from Twitter. You can follow his progress at: http://www.guardian.co.uk/twitter/list/twitripmadrid and http://www.guardian.co.uk/travel/2011/mar/31/twitrip-madrid-twitter-tips.
You can see the recommendations he gets here: http://search.twitter.com/search?q=benji+lanyado
You could try collecting any new vocabulary as the trip progresses or useful structures for describing, asking for suggestions, responding to ideas etc.