Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
It's important to encourage your teenager to write when traveling because it will reveal the adventures, the places visited and the company he/she kept. If there's enough and in-depth entries, you can also gauge what effect/s traveling has to his/her mental, psychological and physiological health. So prod him/her to write. It'll benefit you and your teenager well.