At which pole of the earth can you see the pole star?

Polaris is part of the constellation Ursa Minor and differs in that it points north at any point in the northern hemisphere. True, this does not work in all places at latitudes above 81 degrees north latitude. Moreover, she points to the geographical north at any time of the year. What helped and helps in the first place sailors. However, in the Southern Hemisphere, the constellation of the Southern Cross has a similar function. And in particular – the star Sigma Octant. It is she who will be visible at the South Pole. Moreover, there will not be seen the polar star.