to , ▁short ▁video ▁ ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Puerto ▁Rico ▁Category : Build ings ▁and ▁structures ▁completed ▁in ▁ 1 9 4 1 ▁Category : B rid ges ▁in ▁Puerto ▁Rico ▁Category : Ste el ▁brid ges ▁in ▁the ▁United ▁States <0x0A> </s> ▁Between ▁B ingen ▁and ▁Bonn , ▁Germany , ▁the ▁river ▁Rh ine ▁flows ▁as ▁the ▁Middle ▁Rh ine ▁() ▁through ▁the ▁Rh ine ▁G orge , ▁a ▁formation ▁created ▁by ▁er os ion , ▁which ▁happened ▁at ▁about ▁the ▁same ▁rate ▁as ▁an ▁u pl ift ▁in ▁the ▁region , ▁leaving ▁the ▁river ▁at ▁about ▁its ▁original ▁level , ▁and ▁the ▁surrounding ▁lands ▁raised . ▁This ▁g orge ▁is ▁quite ▁deep , ▁about ▁ ▁from ▁the ▁top ▁of ▁the ▁rocks ▁down ▁to ▁the ▁average ▁water - line . ▁ ▁The ▁" Middle ▁Rh ine " ▁is ▁one ▁of ▁four ▁sections ▁( High ▁Rh ine , ▁Upper ▁Rh ine , ▁Middle ▁Rh ine , ▁Lower ▁Rh ine ) ▁of ▁the ▁river ▁between ▁Lake ▁Const ance ▁and ▁the ▁North ▁Sea . ▁The ▁upper ▁half ▁of ▁the ▁Middle ▁Rh ine ▁( R h ine ▁G orge ) ▁from ▁B ingen ▁( R h ine - kil ometer ▁ 5 2 6 ) ▁to ▁Kob len z ▁( R h ine - kil ometer ▁ 5 9 3 ) ▁is ▁a ▁UN ES CO ▁World ▁Heritage ▁Site ▁( 2 0 0 2 ) ▁with ▁more ▁than ▁ 4 0 ▁cast les ▁and ▁for tr esses ▁from ▁the ▁Middle ▁A