La Habana Vieja (Old Havana) is the city center and a UNESCO World Heritage site located in downtown Havana. It has many historical sites and tourist spots, including Plaza de Armas (the main touristic square), Capitolio Nacional (which used to be the seat of government in Cuba until the Cuban Revolution in 1959 and is now home to the Cuban Academy of Sciences), La Cabaña fortress, and famous seaside roadway Malecón.
Calle Obispo (Obispo Street) is the main tourist street and the best place to buy souvenirs in Havana. This car-free street that starts from the south of Parque Central and continues to Plaza de Armas is packed with art galleries, shops and people from all over the world.
Stop by the famous El Floridita, the place where Ernest Hemingway used to drink daiquiris.