Rukn Al Yamani
There are only two corners of the Ka’bah that are still in the same place as they were from the time of Adam (AS) to Ibrahim (AS) to our Prophet Muhammad (SAW). They are the Black Stone corner and the Yemeni Corner.

The Prophet (SAW) would touch and kiss the Yemeni Corner when passing it during the Tawaf. The Yemeni Corner is on the southern side of the Ka’bah, the last corner before the Black Stone.
Between the Yemeni Corner and the Black Stone Corner the Prophet ( SAW) would make the following Du’a “Rabbana Atina, Fid Dunya Hasanah, wa Fil Akhirati Hasanah, wa Qina ‘Azab Al-Nar” – “Oh Lord, Grant us the Good of this World, and the Good of the Next World, and Save us from the Punishment of the Fire”.