Herculesʹ Pillars
.Calpé and Abʹyla, one at Gibraltar and one at Ceuta, torn asunder by Hercules that the waters of the Atlantic and the Mediterranean Sea might communicate with each other. Macroʹbius ascribes these pillars to Sesostris (the Egyptian Hercules), and Lucan follows the same tradition.
I will follow you even to the pillars of Hercules. To the end of the world. The ancients supposed that these rocks marked the utmost limits of the habitable globe. (See above, Herculesʹ Pillars.)