When the spies Moshe sent to scout the land of Canaan returned with their report, they testified (Numbers 13:32) that the land "eats its denizens," many of whom happen to be giants. In fact the spies, to the extent that their propaganda can be trusted, felt so dwarfed by the Israeli landscape that they claimed they must have resembled grasshoppers to the giants, and even felt like locusts themselves. The description of Canaan in Leviticus 18:28 is no rosier; the land has an allergic reaction to disobedient citizens and literally "spits them out."
The land of Israel's holiness features four cities that are singled out as exceptionally holy, and which are imbued with special qualities. I have had the good fortune to visit all four - Hebron, Jerusalem, Tiberias and Safed - if only for a short time. Each of these cities is associated with a particular kind of holiness, corresponding to the four basic elements: Jerusalem - fire; Hebron - earth; Tiberias - water; and, my favorite, Safed - air.