Deuteronomy 3:5

All these cities fortified with high walls, doors and bars; besides of cities of the open country exceedingly many.

Numbers 13:28

Only that the people are strong dwelling upon the land, and the cities fortified, and very great: and also we saw the children of Anak there.

Deuteronomy 1:28

Whither are we going up? our brethren melted our heart, saying, A people great and high above us; cities great and fortified to the heavens; and also, the sons of the Anakims, we saw there.

Hebrews 11:30

By faith the walls of Jericho fell, having been surrounded for seven days.

Treasury of Scripture Knowledge

Summary

All these cities were fenced with high walls, gates, and bars; beside unwalled towns a great many.

Bible References

General references

Deuteronomy 1:28
Whither are we going up? our brethren melted our heart, saying, A people great and high above us; cities great and fortified to the heavens; and also, the sons of the Anakims, we saw there.
Numbers 13:28
Only that the people are strong dwelling upon the land, and the cities fortified, and very great: and also we saw the children of Anak there.
Hebrews 11:30
By faith the walls of Jericho fell, having been surrounded for seven days.