Barcelona, the capital of the Catalonia region, is probably the most popular destination in Spain, priding itself with mindblowing architecture, artsy scene, and museums of world-famous artists. The city is like an open-air museum, where you need to be careful while strolling down its streets in order not to miss something very unique and beautiful. Therefore, here’s the ultimate guide of what to do in Barcelona on a budget. My internet during this trip was sponsored by Beeline. With only 1GB of roaming internet, I perfectly managed to navigate myself in Spain and get directions wherever I was going to. Additionally, with a purchase of roaming internet, you’ll get GPI’s…