the cave of a mythological beast
... that North Korea claims to have found the cave of a mythological beast said to have been ridden by King Dongmyeong of Goguryeo 2000 years ago?
... that <a href="./North_Korea" id="mwBAA" rel="mw:WikiLink" title="North Korea">North Korea</a> claims to have found <b id="mwBAE"><a href="./Kiringul" id="mwBAI" rel="mw:WikiLink" title="Kiringul">the cave of a mythological beast</a></b> said to have been ridden by <a class="mw-redirect" href="./King_Dongmyeong_of_Goguryeo" id="mwBAM" rel="mw:WikiLink" title="King Dongmyeong of Goguryeo">King Dongmyeong of Goguryeo</a> 2000 years ago?