Barcelona is a city steeped in culture and history, so if it's some sight-seeing you're after then you've come to the right place. Barcelona is most famous for the fantastical architecture of Antonio Gaudí, whose building are scattered all around the centre of the city. The most famous and impressive can be seen along Passieg de Gràcia where you will find La Pedrera and Casa Batlló. Or head to the Parc Güell which is a gorgeous parc designed by the man himself. However the most impressive of Gaudí's works is arguably the Sagrada Familia, the huge, still unfinished temple You can't fail to be humbled by such an imposing and ambitious project, the detail on the exterior walls is just staggering, but beware, if you are scared of heights don't be tempted to climb to the top of the turrets.
Other than Gaudí, Barcelona does offer a lot in terms of architectural brilliance. The Gothic Cathedral in the heart of the Gothic quarter is a must-see. Just wandering around Barcelona you will come across a feast of beautiful buildings, and also get off Las Ramblas, there is so much more to see just 2 minutes either side of this famous street.
For all you culture-vultures out there Barcelona has plenty of museums to keep you happy. The MACBA (museum of modern art) and the CCCB next door are worth a look and generally have good exhibitions on every month. The Picasso and the permanent Dalí exhibition in the Gothic Quarter are always popular. The Caixa Forum is a museum which has different art exhibitions every month. It is just off Plaça Espanya, on Avenida Marques de Comillos that is popular with locals but much ignored by tourists, which is a shame because it's great and free! Near the Caixa Forum is MNAC (museum of Catalan art) which is so beautiful inside and out.
Barcelona has great food, there is no doubt about it. You can get anything you want from international food to Catalan favourites, tapas to seafood platters. All you have to do is look around, there are lots of very reasonably priced restaurants, as well as some extremely pricey ones. People here eat late, lunch is usually at 14:00 and dinner at 22:00, for dinner it is usually advisable to book a table. Like with many things, if you want good quality without the price tag then head away from Las Ramblas.
Tapas is particularly good around Barceloneta, this was originally a fishing village and there are still many quaint little local places where you can get fresh seafood tapas for good prices.
Also I would really recommend having a look round the markets, La Boqueria is on Las Ramblas, Santa Caterina close to the Cathedral and Mercat St Antoni are both filled with fresh products to tempt your every sense.
Barcelona is a party city, whatever time of the night or morning there is always something going on. There are bars to suit everyone, weird ones, secret ones, Catalan ones, Irish pubs, ones with great views and ones with a trendy clientele.
The bars are open here till 3 normally so there is no rush, wander around and move from place to place
Barcelona is a child-friendly place and there is a lot that kids will enjoy. For a start there's the Zoo in Parc Ciutadella, the zoo is large and will provide a days easy entertainment for kids and adults. Or there is the aquarium which is the largest in Europe and is always fun.
Another good place for children is Poble Espanyol which is on Montjuïc, just up from Plaça Espanya. Poble Espanyol is an odd place, a village created in 1929 to imitate the different styles of Spanish regional architecture. There are lots of craft shops, and activities you can watch such as glass-blowing. Often there are also kids only activities where you can leave the little ones for a couple hours, last time I was there it was stilt-walking! And while you are in the Montjuïc area don't miss the magical fountain of Montjuïc, a music and light extravaganza