Here are a few things to try and spot when visiting castles. Most were useful for keeping out enemies whose main weapons were bows and arrows, catapults, battering rams and siege towers.
						
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							Moat
							A deep water filled ditch 
							surrounding the castle walls. 
							Many have now been drained.
						
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							Drawbridge
							A bridge that could be raised or 
							lowered from inside the castle to 
							allow people to cross the moat.
						
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							Portcullis
							A strong wooden and iron grating for blocking the gateway. Set in grooves so that it can slide up and down.
						
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							Arrow Slit
							A hole in the wall through which defenders could fire arrows without themselves becoming easy targets.
						
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							Gun-Loop
							After the invention of cannons, 
							holes through which to fire them 
							were often cut below arrow slits.
						
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							Murder Holes
						
						
							Holes in the roof of a passageway 
							through which rocks or boiling oil 
							could be thrown on the enemies below.
						
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							Wall-Walks
						
						
							These were between towers and gave soldiers on guard a good view of the surrounding countryside.
						
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							Machicolations
							These are holes in the parapets or battlements through which stones 
							and weapons were thrown.
						
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							Fireplace
							In ruined castles these are often seen 
							high up on interior walls. This shows where wooden floors used to be.
						
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							Spiral Staircases
							These wind around a central pillar 
							inside towers, they connect the separate storeys of the castle.
						
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