Santiago de Compostella
Santiago de Compostela is a World Heritage City.
You can find out all about it at https://www.santiagoturismo.com (select the English language version at the top of page).
Getting There
There is a regular train service from La Coruña that takes 30 / 40 minutes and costs about 6 - 8 Euros each way. It's a bit of a climb up from the station to the old town, but you can easily get a taxi for about 5 Euros.
You can buy tickets at the station but in Spain you have to book a seat so there is always a chance that the train that you are planning to catch is full and you have to get the next one.
Alternatively, you can buy online at https://www.renfe.com/es/en/viajar/informacion-util/horarios.