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 Santo Cristo del Buen Viaje Church is a simple yet charming church. It is located in Plaza del Cristo Square, on the western side of Old Havana, away from the city center and tourist areas. The structure of the church is intriguing because of the simplicity of its towers and of its lateral façades, in complete harmony with the character of the works of the 17th century. The church was built in 1732 in the same place where previously there was a Franciscan shrine. Nowadays it has only partially been restored, with its beautiful stained glass windows and brightly colored ceiling being very noteworthy qualities. Inside the church, the image of Jesus on the Cross among travelers and sailors became very popular because it was thought to keep people from harm. On Good Fridays the processions left from the Convento de San Francisco de Asís and ended at the Iglesia del Cristo. The dimensions of the plaza were planned according to the processions that were to take place in it, marking the end of the fourteen crosses or Stations of the Cross. The Plaza del Cristo Square is an ideal place if you want to get far from touristy areas and to witness what real Cuban life is like.

The Catedral Ortodoxa de Nuestra Señora de Kazán (Nuestra Señora de Kazán Orthodox Cathedral), declared World Heritage Site by UNESCO, is one of the newest constructions in Havana, being built in 2000. This Russian Orthodox church is Byzantine in style. It has six beautiful domes, two of which (the biggest and smallest) are gold-sheeted, and the rest are made of bronze. Its staircase entrance calls our attention and is considered the second largest staircase of all outside Russia. From the interior, its golden altar stands out, built in Trinidad and the San Sergio Monastery, Russia; and the murals adorning its walls.

The neighbors of the town insisted to the town council on the need to create a new public square for their amusement. In 1587, the town council decided to use as a public square the area behind the Convento de San Francisco, which was being built at the time. During the latter decades of the 16th century, this square was called the Plaza Nueva (new square), but from the 18th century onwards, once the Plaza del Cristo had been built, it began to become known as the Plaza Vieja (old square). The most remarkable feature of this square are the buildings around it, with their unquestionable historical and artistic importance of having been the blueprint for a style of architecture which, along with certain developments, subsequently spread throughout the city and characterised the Cuban architecture of the 18th century.