Heracles in Narrow Straits
In Sophocles, Tr. 101 the expression δισσαῖσιν ἀπείροις κλιθείς does not just refer to the Pillars of Heracles, but evokes the theme of pillars and narrow passages as a gate to the Underworld, well attested in mythology and folklore: cf. Samson, Atlas, and the Sun-god.
Sophocles; Trachiniae; Heracles’ Pillars; Heracles; Greek folklore