'In the Wilderness' in the Bible

In those days John the Baptist appeared, preaching in the Wilderness of Judea [along the western side of the Dead Sea] and saying,

This is the one who was mentioned by the prophet Isaiah when he said,“The voice of one shouting in the wilderness,‘Prepare the road for the Lord,Make His highways straight (level, direct)!’”

As these men were going away, Jesus began to speak to the crowds about John: “What did you go out in the wilderness to see? A reed shaken by the wind [which is commonplace]?

So if they say to you, ‘Look! He is in the wilderness,’ do not go out there, or, ‘Look! He is in the inner rooms [of a house],’ do not believe it.