/lit/ - Literature

Do you know any good science fiction novel about of past human civilization?
The story of "Foundation and Earth" is settled 20.000 years in the future respect the novels of Robot Series.
In this book the main protagonists are in search of the ancient planet Earth and on their journey they discover uninhabited worlds previously colonized by humans.
In this history they do to ancient human civilizations references, languages and cultures that they changed, forgotten historical figures, etc.
So, do you know some good similar story?