A tall structure used for observation and surveillance, allowing guards to spot danger or movement from a distance.
Compound of 'watch' (from Old English 'wæcce' meaning to guard) and 'tower' (from Latin 'turris'). The compound emerged in medieval times to describe fortification features.
The most famous watchtowers are the Great Wall of China's beacon towers—they didn't just watch, they transmitted messages using fire and smoke signals across hundreds of miles, creating an ancient information network that worked 24/7.
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