ancient architecture arrow battlement castle defence defend England fortress gatehouse Great Britain protect protection secure security slot stone turret uk united kingdom battlements clouds coastline Cornish cornwall english fort island mainland Michael mount national trust ocean power saint sea sky St. Michael's Mount stronghold towers water boundary Causeway damp edge exercise field green landscape margin marshy meadow ruins spring stroll Sussex walk walkway Austria baroque cathedral cityscape europe hill houses medieval Mozart panoramic salzburg tourism town view arrest cage grounds prison show tool tools torture transport trokai wheeled wheels wooden yard attraction build building flowers incredible palace park place queen tourist unbelievable arches city david fortifications historical interior Israel Jerusalem old olive tower walls