The Internet Archive has a plethora of resources. You can search for books, magazines, videos, and even old web pages about/from any of Latin America, the Caribbean, and Iberian countries. For example, you can type Cuba + topic, Cuba "travel books". to find travel books written by travelers that visited Cuba. Tip: When when you are on the results page, sort the books by Date Published to see the oldest books first.
Cervantes Virtual is the portal of the Biblioteca Virtual de Miguel de Cervantes. You can freely access a wide variety of classic Spanish language literature from Spain, Latin America, and the Spanish Caribbean.
O Camões, I.P. disponibiliza um conjunto de textos e documentos de grande relevância cultural e linguística na sua Biblioteca Digital, pretendendo, assim, fazer chegar o Português a um universo cada vez mais amplo de falantes e estudantes.
Publishers' description: "The editorial vocation of El Colegio de México has its origins in 1938, the year of the founding of La Casa de España in Mexico, its historical antecedent. El Colegio has had as one of its main tasks the publication of the work of the researchers of its study centers. It has also been dedicated to the dissemination of outstanding authors from other institutions, both national and foreign.