Another very interesting option is the walks along the coast in the north direction. From the apartment you can start the route to Badalona, continue to Masnou and so on. During the entire walk you can enjoy the sea.
The walk can be extended as much as you want since every 5 km approximately there are train stations to return to Sant Adriá whenever you want.
As in the previous tour of the Avenida Litoral de Barcelona, it is especially advisable to perform this activity during the sunrise.