"The former central post office was turned into a one-million-square-feet, jaw-dropping cultural center in 2010. Dedicated to art, it’s a great place to check out temporary exhibits, attend shows and performances, and take yoga and dance classes. For a list of activities and schedule, visit the official website and book tickets here. Many activities are free of charge. The highlight is the “ballena azul” or blue whale, a balloon-like, three-story, 1,750-capacity auditorium with fantastic acoustics.The palaces of the city center — There are many palaces in the city, but the following three are must-see attractions for those who get a kick out of cool architecture." - MATADOR_NETWORK