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古北口,位於密雲縣古北口鎮東南。古北口地勢險要,在山海關與居庸關中段,山陡路險,地勢險峻,是聯系華北、東北地區的重要通道,屬歷代兵家必爭之地,故有“京師鎖鑰”之稱。 古北口長城是中國長城史上最完整的長城體系。由北齊長城和明長城共同組成,包括臥虎山、蟠龍山、金山嶺和司馬台4個城段。古北口是山海關、居庸關兩關之間 的長城要塞,為遼東平原和內蒙古通往中原地的咽喉,歷來是兵家必爭之地,尤其是在遼、金、元、明、清這五朝,大大小小爭奪古北口的戰役從未停止過,因此長 城的作用突顯得尤為重要。 遠去了金戈鐵馬的和平年代,背靠長城的村民收入主要靠長城旅游資源拉動經濟,山區耕地面積不多,果樹種植有限。隨處可見旅游接待的農戶。 回想最近來古北口還是2006年,和幾個朋友一起住在這裡的河西村,農戶接待還很少,但很熱情,只是在這裡短暫的居住2天,游覽旁邊的臥虎山長城,蟠龍山有點遠就沒有去,當時奔名聲比較響亮的金山嶺和司馬台長城。(當時拍下的照片http://www.lvye.org/modules/lvyebb/viewtopic.php?view=1&post_id=1491159)。不過這次終於如願游覽的蟠龍山長城,把整個周邊的長城貫穿下來。
古北口