Why does Adam leave Granada before seeing Alhambra in the novel, Leaving the Atocha Station?

Granada is known for its repository of Moorish architecture dating from the period from before the Reconquista. The most famous of these architectural treasures is the Alhambra. Remarkably, Adam and Isabel leave without having visited Alhambra because Adam is feeling too hurt over Isabel’s rejection of him to enjoy staying in the city.