Very interesting part of your trip. I like the ruins and the history of them. The coastline is very lovely, especially the rocky parts. I love the sea, it's always so relaxing to listen to the waves lap and to sit and watch the (mostly) nothingness - but you saw dolphins, how lovely, but a pity you didn't have a telephoto lens at that time.

Amusing story about the train border guards! What a job they have :)