距特(te)克(ke)斯縣城40公(gong)(gong)里(li)(li)處(chu)有一個(ge)克(ke)桑溶(rong)(rong)(rong)洞(dong)(dong)(dong),屬于喀斯特(te)溶(rong)(rong)(rong)巖地貌,經專家鑒定,是(shi)新疆(jiang)(jiang)唯一的(de)(de)(de)石(shi)灰巖天(tian)然(ran)地下溶(rong)(rong)(rong)洞(dong)(dong)(dong),也是(shi)我國最西(xi)部的(de)(de)(de)溶(rong)(rong)(rong)洞(dong)(dong)(dong)。目前(qian),溶(rong)(rong)(rong)洞(dong)(dong)(dong)已探明的(de)(de)(de)部分約3公(gong)(gong)里(li)(li)長(chang),最寬(kuan)處(chu)約18米,最窄處(chu)僅容一人匍匐(fu)通過。洞(dong)(dong)(dong)內石(shi)鐘(zhong)乳(ru)(ru)、石(shi)筍(sun)、石(shi)蘑多呈乳(ru)(ru)白、奶黃色,少(shao)數為(wei)綠色、黑色,千姿百態,絢麗(li)多彩(cai)。特(te)克(ke)斯縣闊克(ke)蘇河上游還有一片(pian)“天(tian)山石(shi)林(lin)”,為(wei)新疆(jiang)(jiang)第(di)一大石(shi)林(lin),在全國名列第(di)二。它是(shi)200萬年(nian)前(qian)強烈(lie)造(zao)山運動形成的(de)(de)(de)典型(xing)的(de)(de)(de)雅丹地貌,長(chang)約9公(gong)(gong)里(li)(li),寬(kuan)約5公(gong)(gong)里(li)(li)。天(tian)山石(shi)林(lin)狀(zhuang)如塔松,頂尖底圓(yuan),垂直(zhi)高聳(song),一般高20—30米。