If you're thinking about going to Barcelona, you can't go wrong with that choice. There's a bit of everything there. Good weather if you go around May, amazing architecture, rich history, good food, rich culture and good nightlife to name a few. NH Sants Barcelona
I was only there for three nights but I stayed at NH Sants Barcelona which was a pretty decent hotel. The rooms were small but thats Europe for ya and it could run you anywhere from $124 - $300 a night depending on high or low season. Reception staff friendly and helpful. Hotel close to the main Barcelona train station along with supermarket and everyday article shops.
Restaurante Barceloneta
I had the best food at Restaurante Barceloneta while in Barcelona. Have dinner outside on the patio overlooking the sea. Make a reservation before you go. If you're on a budget it might not be the best place to go but its not the most expensive either.
Boqueria Market
Boqueria Market is one of the most famous food markets in the world. It's located right off Las Ramblas and if you want to kill time and walk around you can do that here. Definitely try some of their fresh local food and if you're staying in an airbnb then you can buy things and bring back home to cook if you have the time. Items to the front of the market tend to be more expensive so browse around a bit and the further towards the back you go the cheaper things are.
Kino Barcelona
Kino Barcelona is a nice place to have lunch. The place had a really cool atmosphere and is situated right next to MACBA. The perfect spot to sit and enjoy a few drinks while watching the skaters outside. Make sure you try their fried avocados.
Antoni Gaudi
The architect behind most of Barcelona's famous architecture such as The Sagrada Familia, Park Guell, Casa Mila, Gadi House Museum, just to name a few. They are all worth checking out if you have the time. A great way to see much of the city is to utilize the Hop On Hop Off Tour bus. For around thirty euros you can take it to most of the attractions around Barcelona. I believe it has about 44 different locations and like the name suggests you can hop on and hop off as you please.
Montserrat Day Trip
About an hour away from Barcelona is this beautiful place called Montserrat and its the perfect option for a day trip out of the city. The area is rich with history, and its a completely different feel from Barcelona. Some of the best views I saw on my visit to Barcelona was here.
https://www.youtube.com/watch?v=8wutjnFtKzY
Overview
I really enjoyed my time in Barcelona. Its not the cheapest place to go but it can be done on a moderate budget. There's plenty to do there and the people were so nice. Very easy city to get around in. You can choose from the bus, the trains, taxis or even uber. Three nights might not be enough time to fully explore this city but its enough to get you hooked for a possible return trip there in the future.
Gear Used
Camera - http://amzn.to/2vjTHN8
Mic - http://amzn.to/2uE41h2
Drone - http://amzn.to/2vko9Xu