Watchtower

['wɒtʃtaʊə] or ['wɔtʃ,taʊr]

(noun.) an observation tower for a lookout to watch over prisoners or watch for fires or enemies.

Typed by Ewing--From WordNet

(n.) A tower in which a sentinel is placed to watch for enemies, the approach of danger, or the like.

Checker: Seymour

Checker: Peggy