I am going to Barcelona in the start of July together with a friend. We have 3 to 4 days (in Barcelona) and we want to see some beautiful nature and the possibility to hike, and we also want to spend as little money as possible. The budget is quite tight.
If there is nothing in Barcelona, we are open to other destinations, as long as it's relatively cheap getting there (train/plane).
Unfortunately one of us will have a 20 kg suitcase, so it would be great if we could have a hotel and then make daily trips.