"Love in the Time of Cholera" by Gabriel García Márquez, and all of his books. Such a different way of writing.

For me it's a toss up between The Idiot by Dostoyevsky and The Monk by Matthew Lewis. Totally different stories and styles but I've read both of them multiple times and I find them unforgettable.

The poem "No man is an island" by John Donne

The Count of Monte Cristo.

Epic poem Os Lusíadas by great Portuguese writer Luís Vaz de Camões, about the travels of Vasco da Gama