Public transport in Cassà de la Selva: http://www.teisa-bus.com/en/index.html.
What to visit in Cassà de la Selva: https://www.cassadestapa.cat/en/.
What to visit in Girona: https://www.girona.cat/turisme/eng/index.php.
What to visit in Costa Brava: https://en.costabrava.org/enjoy