▁down stream ▁from ▁Wolf ▁Creek ▁Dam , ▁which ▁imp ounds ▁Lake ▁C umber land . ▁The ▁Rock house ▁is ▁class ified ▁as ▁a ▁me ander ▁natural ▁bridge ▁because ▁it ▁was ▁created ▁by ▁river ▁er os ion ▁of ▁a ▁cl iff ▁on ▁the ▁outer ▁side ▁of ▁a ▁sharp ▁me ander ▁in ▁the ▁river . ▁Jim ▁Creek ▁flows ▁through ▁it ▁before ▁mer ging ▁into ▁the ▁C umber land ▁River . ▁With ▁a ▁span ▁of ▁, ▁it ▁is ▁the ▁sevent h ▁largest ▁natural ▁bridge ▁in ▁the ▁United ▁States . ▁ ▁History ▁The ▁Cre els bor o ▁Natural ▁Bridge ▁consists ▁of ▁Upper ▁Ord ov ician ▁Period ▁sil ty ▁dol om ite ▁of ▁the ▁C umber land ▁Form ation . ▁Un like ▁most ▁natural ▁brid ges ▁it ▁is ▁made ▁of ▁dol om ite ▁rather ▁than ▁sand stone . ▁First ▁discovered ▁in ▁ 1 7 7 0 ▁by ▁a ▁group ▁of ▁hun ters , ▁Rock house ▁is ▁a ▁popular ▁site ▁for ▁camp ing . ▁It ▁was ▁designated ▁a ▁National ▁Natural ▁Land mark ▁by ▁the ▁U . S . ▁National ▁Park ▁Service ▁in ▁ 1 9 8 7 . ▁It ▁remains ▁priv ately ▁owned ▁but ▁is ▁accessible ▁by ▁a ▁short ▁walk ▁from ▁K Y ▁ 3 7 9 . ▁Im medi ately ▁across ▁the ▁river ▁in ▁Cl inton ▁County ▁is ▁the ▁private ▁Rock house ▁Trace . ▁ ▁See ▁also ▁ ▁Natural ▁arch ▁ ▁Rock ▁shelter ▁ ▁References ▁ ▁Cre els bor o ▁Natural ▁Bridge ▁Rock house ▁B ottom ▁Rock house ▁Pictures ▁Kentucky ▁Ge ological ▁Survey ▁Kentucky ▁Ge ological ▁Survey ▁G