Hey Maysun,
Studying in Spain? Sounds really great!
I've only been to Barcelona and absolutely
loved it! The architecture alone is incredible. The food, the nightlife, the markets, the cafes.....I would go back in a heartbeat and see more of the country.
My top three must-sees in Barca are La Boqueria market where we shopped for all our groceries and had a great time just perusing the aisles, definitely La Sagrada Familia and the other Gaudi attractions, like Parc Guell and Casa Batllo, throughout the city (they are pretty amazing)! My absolute top favourite, which you'll love if you like art museums, was National Art Museum of Catalonia. The art inside is magnificent and that's an understatement! We also saw a football match at Nou Camp, which was also quite an experience.
Barcelona is such a great city and a great place to just wander around and check things out. I wouldn't worry much about being alone. Just grab a map and hit the streets.
I'm sure you have many attractions in mind in the cities you're going to visit but check out some links to some of the attractions you might not want to miss;
Things To Do In BarcelonaThings To Do In GranadaThings To Do In ValenciaThings To Do In TarragonaThe thing I like about Tripadvisor is that each attraction usually has a number of reviews from people who have visited. So if you don't get any feedback from other travelers you can sort of get an
idea if a place or attraction is really worth seeing or not according to other tourists. That's not to say that sometimes you just have to ignore a bad review and check it out yourself
