Few places offer city views like Montjuic. The name literally means 'Mountain of The Jews' and is a former military base in Barcelona. Today it boasts some of the most gorgeous views of the entire city of Barcelona and also holds open air movie festivals during the summer amongst a host of other activities and parties. Check out the Terrace nightclub, especially during summer as there's always cool and fun events featuring well-known dj's. Close to Poble Sec and Plaza Espanya, Montjuic is a great place to explore, especially during the evenings. You can get there via cable car, foot or public bus.