Castle acre priory ruins in southern park, norwich, with green fields, aerial view

castle acre priory aerial shot norwich southern park ruins historical site medieval architecture ancient heritage conservation tourism travel destination england uk countryside green fields monastery old stone walls archaeology english history norfolk landmark deserted cultural site past overhead view british isles tourist attraction monumental grassland decay structure architectural ruins exploration drone footage historical landmark preserved religious history gothic serene tranquil no people outdoor vastness ancient civilization european history scenic