Vineyards were generally on hills
(Isa. 5:1; Jer. 31:5; Amos 9:13); surrounded by walls or hedges to keep out boars (Psa. 80:13); jackals and foxes (Num. 22:24; Neh. 4:3; Song of Sol. 2:15; Ezek. 13:4; Matt. 21:33). Towers were erected within the vineyard for watch-houses and dwellings for the vine-keeper (Isa. 1:8; 5:2; Matt. 21:33).