I know it is not ideal and no one would like to visit a place on a rainy day, but here some ideas on how to spend your time and get to love the place if you have the great "luck" of getting there on a rainy weekend.
Explore the Food scene in Madrid
Start with a coffee in a local bar
instead of heading to Starbucks or similar why not go to have coffee where the local people go? :)
RSS Feed