If you want to take a break from your busy life and let yourself loosen up to a far off different place where you can sit on a wooden bridge with your bare feet just above the water, and a good book with a sandwich on the other hand, then Maremagnum is the place to be for maybe just a little while. And then if you want to put your shoes back on and walk, then wander around the , it's medieval style occupies an integral part in the center of the city.
The Walk in Born is another very popular area with great restaurants and places to have a few drinks, or be at Gracia, a neighborhood just off Park Guell, is full of local culture and plenty of places for relaxing and eating. The Park Guell on the other hand, is a panoramic view of the whole city of Barcelona. But maybe you'd much rather prefer to catch glimpses of city views in one of the most popular indeed majestic hotels in Barcelona as that from the rooftop of Hotel Majestic itself in Passeig de Gracia, it's right in the very heart of the city, and more than the luxurious accommodations and superior services, here you can have the best shopping you can imagine.
The La Pedrera organizes a large exposition of Gaudi works that is also covering and Casa Batllo. The exhibit is a good place to start your exploration of Gaudi as it reveals many interesting details of architectural works.
If you want to get tanned, take note that starting from Barceloneta you can explore the beachfront boardwalk, and get preoccupied with the sun and waves by going through the beautiful beaches of the Mediterranean where every Sunday night throughout summer the entertainment showcase is great.
It's a fact that Barcelona is truly a wonderful place to be. The number of places you can explore are no doubt fascinating and you'll be even more surprised of what you'll learn from them. Even your choice of shelter can basically get you in tune for your yet to be awesome catches of the holidays, so be wise and pick a terrific as you get off. Good luck.