The object of the competition is the covering of the ADIF railway between the Social theatre and the Gaztañabaltza park. In addition, special attention has been paid to minimize the impact on the landscape and to seek greater integration, especially with neighbouring streets. The proposal adds value to a, so far, depressed area. For this purpose a connection is defined between the hard squares in the centre of Basauri and the Gaztañabaltza park. The connections is a green and natural belt with a biological nutrient function.