<prompt> Translate the following text to EnglishAnza katikati, kwenye pango la zamani zaidi, kisha uende upande wa mashariki kabla ya kurudi kwenye mapango ya baadaye ya kihistoria kwenye mlango wa magharibi.  <response>: Start in the middle, at the oldest, then work your way east before returning to the historically later caves at the western entrance. 