my brother is stationed in Spain. He's currently using leave time to travel to right now and he loves it. He just went from Amsterdam to Belgium and Frankfort. I'm envious of his travels.
I did some sightseeing in Spain. My boss was seeing a Spanish girl and she would go to the next port and be waiting on the ship.Since I'm terrible trying to learn new languages, having a local to help out was a huge plus. Of course we were in port towns, and they see sailors as ATM's. Having her along meant we paid normal prices for stuff.
I never got to go too far inland in most countries, but did get to spend almost three unplanned weeks in Athens when the Saipan's stern gate took a dump while halfway open. That was a pretty cool time. We had to take a taxi a couple of miles from the shipyard to the last subway station, then you could ride where ever for next to nothing. We got to be friends with a Irish and an American girl who lived there. So they showed us around the city.