Barcelona, the capital of Spain's Catalonia region, is the second biggest city in the entire country and well-known throughout the world as an international centre of culture, history, art and atmosphere. There is plenty to do in the city – savour the unique architectural work by Gaudi, explore the stalls at the Boqueria market or simply enjoy the Catalan atmosphere and cuisine. Hiring a car from Barcelona Sants Railway station is a great way to have access to the city's amenities as well as the rest of Catalonia and northern Spain.