Midrash Bereishit Rabba [67:6] states that “from the dew of heaven” refer’s to Beit Guvrin, which is a very fertile area. In fact, the blessing relates specifically to grain and wine. Approaching Beit Guvrin from the north, one passes wheat fields, and continuing south one passes vineyards, a reality which corresponds to the Midrash.
Within the Beit Guvrin National Park there are approximately 3000 man-made caves. Some were used as olive presses, others as cisterns or granaries, and some were used as hideouts during the Bar Kochva revolt.