krakow barbican a majestic medieval fortress gateguarding polands historic old town

world unesco travelogue travel towns town tourist tourism tour time tapestry structure step stands square sites site sightseeing served sentinel rich protecting preserved preservation polish polands poland originally old meticulously medieval majestic magnificent landmarks landmark krakow key invaders imposing history historical historic heritage guide gateguarding gate fortress fortifications formidable exploration european europe element destinations design defensive culture crucial constructed citys city cities