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雙河(he)洞(dong)，國家(jia)地質(zhi)公(gong)(gong)園(yuan)，2019年(nian)最新探測(ce)長(chang)度為257.4公(gong)(gong)里，成亞洲(zhou)第一、世(shi)(shi)界(jie)第五長(chang)洞(dong)。雙河(he)洞(dong)國家(jia)地質(zhi)公(gong)(gong)園(yuan)，位于貴州省(sheng)遵義市(shi)綏陽(yang)縣(xian)溫(wen)泉(quan)鎮(zhen)，是(shi)中國最大(da)的溶洞(dong)群，也是(shi)“世(shi)(shi)界(jie)最長(chang)的白云巖洞(dong)穴(xue)”、“世(shi)(shi)界(jie)最大(da)的天青石(shi)洞(dong)穴(xue)”。

雙河洞(dong)(dong)(dong)(dong)(dong)結構復(fu)雜(za)，水洞(dong)(dong)(dong)(dong)(dong)、旱洞(dong)(dong)(dong)(dong)(dong)并存，深度超過550米，由上中下四層8條主洞(dong)(dong)(dong)(dong)(dong)，200多條支洞(dong)(dong)(dong)(dong)(dong)，5條地下河，34個洞(dong)(dong)(dong)(dong)(dong)口組成，可(ke)謂洞(dong)(dong)(dong)(dong)(dong)挨洞(dong)(dong)(dong)(dong)(dong)、洞(dong)(dong)(dong)(dong)(dong)連(lian)洞(dong)(dong)(dong)(dong)(dong)、洞(dong)(dong)(dong)(dong)(dong)上有洞(dong)(dong)(dong)(dong)(dong)、洞(dong)(dong)(dong)(dong)(dong)下有洞(dong)(dong)(dong)(dong)(dong)、洞(dong)(dong)(dong)(dong)(dong)中套洞(dong)(dong)(dong)(dong)(dong)，被譽為“喀斯特天然(ran)洞(dong)(dong)(dong)(dong)(dong)穴博(bo)物館”。

自1988年(nian)以來，雙(shuang)河洞(dong)吸引了海(hai)外(wai)探(tan)險(xian)家(jia)持續探(tan)測31年(nian)之(zhi)久。截(jie)至2017年(nian)4月，完成探(tan)測長度達200.427公里(li)，是世(shi)界(jie)排(pai)名第十的(de)長洞(dong)。雙(shuang)河洞(dong)也是目前世(shi)界(jie)最長的(de)白云(yun)巖和世(shi)界(jie)最大的(de)天青石(shi)洞(dong)穴。