martello tower. dalkey island. ireland

abandon abandoned absence age aged ageing ancient antique antiquity archaeology architecture army blue building castle church cliff coast cracked dalkey defence defense derelict down dublin eire europe folkestone fortification guard gun heritage hide hill historic history horizon invade ireland island islands landmark landscapes lookout martello military monument napoleon nation national nobody observation offshore old past relic remains rock rocks round ruin ruined ruins sea seaside shoreline sky stone tourist tower travel view vintage wall war watchtower water weathered world