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

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

The Count of Monte Cristo.

The poem “No man is an island” by John Donne

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.