I find it hard to believe that this was written in 2 A.D. Perhaps I've grown sceptical about the authenticity of certain things. Although considered (by some) to be the first tale of science fiction, I would say that it is more fantasy: giants, giant wales, giant birds, islands of Heroes and other fantastical creatures. Some of the elements are actually just plain silly (a planet of lamps?) - not that I'm being tempocentric.
It reminded me of Gulliver's Travels somehow but without the politics and misanthropy -instead of which, is a crisp and clearly marked snipe at the 'historians' of his time.