The sumptuous Cathedral Square isthe focus of Old Havana life. Of particular interest in the Cathedral Square are the Cathedral, a baroque church, and the Museo de Arte Colonial, housed in a handsome pal­ace dating from 1622. Tourists linger at El Patio’s outdoor café, sipping coffee or mojitos and tapping their toes to Cuban son.

Plaza de Armas surrounds a statue of the patriot Céspedes and is ringed by shaded marble benches and second-hand bookstalls. This square, founding in 1519, was the city's first open space, around which the most important political, military, religious and civil institutions were located. The palaces that surrounded it during the 18th century are worthy exponents of Cuban Baroque architecture. On the square’s eastern side a small neoclassical temple, El Templete, marks the spot where the first Catholic mass was celebrated in 1519. Next door is one of the city’s most luxurious hotels, Hotel Santa Isabel. To the north, the squat but angular and moated Castillo de la Real Fuerza (Fort of the Royal Forces) is one of the oldest forts in the Americas.  

The Museo Alejandro de Humboldt (Alejandro de Humboldt Museum) is located in a Colonial house in Plaza de San Francisco de Asís Square, in Old Havana, Cuba. Its name comes from the German scientist Alejandro von Humboldt, who is seen as the second person to discover Cuba. This is a scientific museum dedicated to biology and its main objective is to preserve research and promote the historical Humboldt’s legacy. This institution enhances the labor of Cuban and international personalities whose contributions are considered relevant for the development of culture in general terms. It exhibits the historical trajectory of the scientific and botanic data he compiled throughout the island at the beginning of the 19th century, as well as a botanic exhibition which is fundamentally made up of ferns. In this museum there is a perfect copy of a Kritosaurus skeleton found in the desert and donated by the Mexican government, as well as an enormous Pterosaur skeleton, which is around 10 meters length. The House also has a conference room with capacity for 100 persons and a specialized library on German literature.

The Museo del Automóvil (Automobile Museum) is located in an 1892 Neoclassical construction in Old Havana. This museum is divided in two exposition rooms, which share the entire collection composed by 30 promenade cars, two rigid trucks, a funeral carriage, a special vehicle, seven motorcycles, a semaphore, three fuel pumps and two didactic imitations. This museum has a very well preserved and interesting collection of old automobiles, among which are the noteworthy Thunderbird, Pontiac, and Ford T, among others. The oldest vehicle in the collection dates from 1905, and the latest one comes from 1989. Most of them are North American, although some cars were made in Italy, Spain, Germany and Great Britain. It houses automobiles related to specific people and others antiquated vehicles. An example of this is the Cadillac used by Ernesto Che Guevara when living in Havana, the 1930 Fiat from Flor Loynaz, or the 1959 Oldsmobile used by Commander Camilo Cienfuegos.