'Desert' in the Bible

"After forty years had passed, an angel appeared to him in the desert of Mount Sinai, in the flame of a burning bush.

Then an angel of the Lord said to Philip, "Get up and go south on the road that goes down from Jerusalem to Gaza." (This is a desert road.)

Now the Spirit explicitly says that in the later times some will desert the faith and occupy themselves with deceiving spirits and demonic teachings,