Planning a trip to Sos del Rey Catolico
From Zaragoza to Sos, a 1 1/2-hour ride away, there is a daily bus at 7pm, returning at 7am the next morning.
To drive from Zaragoza, take the N-330 to Huesca. Continue on the N-330 to Jaca and then bear west on the N-240 toward Pamplona. Turn south at the cutoff to Sangüesa.