乐山硝洞岩探洞归来
其实叫硝斗岩，但一般都叫硝洞岩。距离成都200公里，单边3.5小时。
乐山下了高速到沙湾六车道国道，路面很好
限速70，
过了沙湾之后，双车道，限速60，重车多，不好超车。
过了九五〇街后，最后十来公里山路，坡陡弯急，好在路还算宽。
总体驾驶难度不大。
导航硝洞游农家乐，农家乐门口下面坝子停车。
顺着水泥路走五百米，再走岔路台阶三百米就到天坑顶部。顺着楼梯再下去三百米就到坑底溶洞入口。（水泥路一直走可以到瀑布顶部）
天坑顶部的小卖部那里，左右都有路到天坑中部平台，这里是他们玩速降的起点，建议走右边（面对瀑布）过去，左边路太窄，容易踩溜。
溶洞入口标记右侧，去不得，落差太大。走标记左侧小洞进，轻松无压力。
溶洞主洞据说要走四个小时到底，我们走了一个多小时就返回了。洞厅很大，有暗河，石钟乳很少，应该属于幼儿园级别的溶洞。
岔洞很多，最好别乱钻，跟着最大的走。
没啥吃的，自己带哈。
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https://appimg.52ch.net/pic/20210120/1611154784275344_928.jpg 顶了看
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https://appimg.52ch.net/pic/20210120/1611154814030873_655.jpg 围着天坑走一圈，多角度观看
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https://appimg.52ch.net/pic/20210120/1611154861513661_558.jpg 午餐自己整得烤肉，打包的羊肉汤。
晚餐路过乐山吃的纪老四钵钵鸡。
沙湾镇的彬彬麻辣烫也是很巴适，下次再去吃。
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