Having gotten near the stadium with the Yukols, take a couple steps to the right, and Bouruth should appear. He will show to her yurta and remind her that Kurk and Ayawaska are waiting to talk to you. From your yurta, proceed to the left towards a small bonfire - the shaman and the guide are waiting near the tent with an impressive antler totem. Talk to them and you will learn of a concealed Yukol temple, the entrance of which has to be discovered.
Start the search by locating the cemetery, where the members of the previous caravan lay buried. From the place where Kurk stands, go towards the top of the screen, take the azimuth on the great building of a bleak, brick-red color - however, don't enter through the gate above which hangs a poster.
Instead, take to the closed gate right next to the place (as shown above) - right before it, on the right, is another gate, but for now, don't bother going there.
Instead, take the path opposite of it, among the trees, up the hill.
Follow the path until you reach some abandoned wooden houses, and gravestones (you can read them in zoom). In the center of this place, a sort of a stone obelisk stands, from it, proceed to the left (as shown above).
You will now make it to a house that's clearly inhabited - enter it. After a while, it's resident will appear - talk to her. You will receive a journal of the last Yukol caravan's guide - Youkol manuscript.