R. Binyamin from Toledo* travelled to Eretz Yisroel in the year 1170.
In his travel diary on Meoras Hamachpeilah, he writes, “The Goyim built six tombs and claim each one is for one of the Avos & Imahos.
They fool the ignorant Goyim** and charge them money, to approach the tombs.
When Yidden come there, and pay them money, then they open a metal gate and allow them to go down a staircase which leads to another staircase and then to a third staircase. In there is the cave where the Avos are actually buried. There are six stone Matzeivos engraved with the names of Avraham, Sarah, Yitzchok, Rivka, Yakov, Leah. (no Matzeivah for Adam& Chava) There arealso many barrels filled with bones. These bones are from Yidden who bring their dead, there so they can be buried next to the Avos.
*מסעות ר' בנימין
**Today,also ignorant Yidden believe so.