If you plan to do some physical activity in Barcelona beyond a stroll down the La Rambla, Decathlon is really the only name you need to know. Every single sport is covered in this French-owned megastore, from soccer and tennis to ja-kai (Basque handball) and Ping-Pong. There is swimwear, clothing for jogging, aerobics, cycling hats (and cycles), ski gear, hiking boots, and wet suits. Their prices are pretty much unbeatable, especially on their house items.