A major difference between European cities, Barcelona is lively late at night from tourists and locals alike, more geared towards the night owls and college students. Shops are open past midnight, including retailers for food, desserts, souvenirs, drinks, and more. Walk no more than a few meters to find what you are looking for. During the day, the paths between buildings remind me of Venice in terms of architecture and structural layout. Note the layout of the streets, which are different depending on the part of town you are walking in. This is the city that never sleeps, even more so than any I have visited in the US. The environment in Spain is much more authenticate and tame than in Mexico, and yes, there are no tacos here, just ceviche, tapas, and paella. Again, the food tastes better than the Spanish food in the US as they are not as salty and fresher. The obesity rate is lower here than in the Americas or so it seems. Prices here are more reasonable and 2-3 days is a good amount of time here, give or take. Most people visit to enjoy the chaos but there are plenty of nice areas to enjoy the city by the sea. Many of the UNESCO World Heritage sites here are buildings created by the artist Antonio Gaudi. Each building has a different theme but all of them are equally interesting. As Spain is a laid back country in general, that is the feeling of the city, whether in a park or on the busy streets at night.