Castle acre priory ruins amidst green fields on a cloudy day, aerial view

castle acre priory aerial ruins history architecture medieval heritage england norfolk norwich tourism green fields cloudy sky ancient monastery landmark cultural site cluniac order archaeology conservation travel destination english countryside rural norman stone walls religious history monastery ruins historical landmark tourism england protected site old structure grassy terrain overcast aerial footage sightseeing architectural ruins excavation site european history british culture pastoral remote tranquil outdoor exploration educational drone view southern park