The source has Ἡρακλέους στήλας. Wiktionary tells me that's more like blocks of Heracles, or slabs or monuments. https://www.perseus.tufts.edu/hopper/text?doc=

The source has Ἡρακλέους στήλας. Wiktionary tells me that's more like blocks of Heracles, or slabs or monuments. https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0179%3Atext%3DTim.%3Asection%3D24e https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext... (press "focus" to swap language) https://en.wiktionary.org/wiki/%CF%83%CF%84%CE%AE%CE%BB%CE%B7 https://en.wiktionary.org/wiki/%CF%83%CF%84%CE%AE%CE%BB%CE%B... It's kind of completely unambiguous though, given all the details: > from a distant point in the Atlantic ocean, > the ocean there was at that time navigable; > in front of the mouth which you Greeks call, as you say, 'the pillars of Heracles,' The location is clearly out in the unnavigable Atlantic, and the [whatever] of Heracles form a mouth.