This is a good question. Latin can be hard. Let me give you a grammatical explanation and then translate the sentence for you.
The subject is "urbes" and the two adjectives that go with this word are: "Multae" and "pulchrae."
The verb is "visae sunt." This is a perfect passive tense. This is why the verb is formed with the use of two words.
The rest of the sentence has two prepositional phrases. In light of all of this, the sentence reads:
"Many and beautiful cities were seen in Spain by our friends."