拒馬河(he)溶(rong)洞漂流的(de)起(qi)點位(wei)于(yu)拒馬河(he)畔莊子村(cun),終(zhong)點位(wei)于(yu)野三坡清泉山(shan)附近,是(shi)北京(jing)周(zhou)邊唯一(yi)帶溶(rong)洞的(de)漂流。溶(rong)洞內由多段(duan)組成,蜿蜒曲(qu)折,于(yu)峭壁下的(de)河(he)道(dao)穿(chuan)插前行(xing),洞內鐘乳石(shi)、石(shi)筍(sun)、石(shi)柱(zhu)、多巖(yan)縫隙成群涌(yong)現。穿(chuan)越五顏(yan)六色(se)的(de)溶(rong)洞區域,欣(xin)賞(shang)拒馬河(he)兩(liang)(liang)岸風光,峽谷(gu)兩(liang)(liang)面遍布(bu)著不少(shao)奇石(shi)異景,有(you)“石(shi)猴(hou)戲(xi)(xi)水(shui)”、“石(shi)門頓(dun)開”、“懸崖棧道(dao)”、“天橋拱立”、“沙蟒(mang)攔路”等景點。“石(shi)猴(hou)戲(xi)(xi)水(shui)”在拒馬河(he)湍流之中(zhong)(zhong),巖(yan)石(shi)林(lin)立,裸露(lu)水(shui)面,遠觀其(qi)形(xing),好似猴(hou)子戲(xi)(xi)水(shui)因而得名。“石(shi)門頓(dun)開”是(shi)一(yi)處(chu)塌落(luo)斷崖,形(xing)似大門,非常(chang)壯觀。“沙蟒(mang)攔路”是(shi)一(yi)處(chu)單體突(tu)起(qi)的(de)小(xiao)沙丘,長500米,高(gao)30米,兩(liang)(liang)側傾斜角34度,是(shi)深山(shan)峽谷(gu)中(zhong)(zhong)的(de)“小(xiao)戈壁”。