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.

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 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 Simón Bolívar Museum is situated within an old Neoclassical palace dating back to between 1806 and 1817., right in front of the bronze statue of Latin America’s liberator, in Old Havana. This museum in honor of Simón Bolívar was opened July 24th 1993, coinciding with the anniversary of his birth. It has permanent exhibitions dealing with the history of the Bolivarian nation and its main figures of independence. The museum also houses a great library with important book collections and Latin-American documents.