The Spanish fortress known as El Morro, south of Santiago, was constructed between 1638 and 1700 and was designed by Giovanni Antonelli, the Italian architect and engineer responsible for fortresses bearing the same name in both Havana and San Juan, Puerto Rico. El Morro was built to ward off pirates (and rebuilt after a 1662 attack by the English pirate Henry Morgan). Today, its solid walls house the Museum of Piracy, its rooms also reflects the main events connected with the naval battle of Santiago de Cuba, episode of the Spanish-Cuban-American in 1898 and photographs related to the events of Maine , the Spanish and U.S. military leaders, Admiral Pascual Cervera and Vice Admiral Sampson and planes and coastal defenses and batteries of El Morro. There are wonderful views from interior rooms, which have wooden floors and stone walls, as well as from various terraces.

This Spanish-colonial mansion was the birthplace of poet José María Heredia, who, because of his pro-independence writings, is considered Cuba's first national poet. Heredia died in 1839 at age 36 while exiled in Mexico. The house, now just a fraction of its original size, displays period furniture and some of the poet's works and belongings. The home's traditional interior patio is planted with trees and plants—including orange, myrtle, palm, and jasmine—associated with Heredia's verse. A marble plaque on the house's Calle Heredia facade excerpts one of the poet's most famous works, "Niágara".

This is one of the continent's oldest cathedrals, the seat of the fourth bishopric of America, although the building that it currently occupies was built in 1922, thus reflecting the eclectic style of architecture. One of its sides houses the Ecclesiastical Museum, with a valuable collection of furniture, paintings and sacred artefacts

The museum of the Clandestine Struggle is located Padre Pico steps up. This excellent museum, in one of the city’s finest colonial houses, focuses on the activities of the resistance movement under local martyr Frank País. Residents of Santiago were instrumental in supporting the Revolution, as were peasants in the Sierra Maestra. From the museum’s balcony, there are tremendous views of Santiago and the bay.