bn ▁Kh ord ad be h ' s ▁Book ▁of ▁Ro ads ▁and ▁Kingdom s ▁( ), ▁in ▁which ▁it ▁is ▁referred ▁to ▁as ▁Set ▁Band hai ▁or ▁Bridge ▁of ▁the ▁Sea . ▁Some ▁early ▁Islam ic ▁sources ▁refer ▁to ▁a ▁mountain ▁in ▁Sri ▁L anka ▁as ▁Adam ' s ▁Pe ak , ▁( where ▁Adam ▁supposed ly ▁fell ▁to ▁earth ) ▁and ▁described ▁Adam ▁as ▁crossing ▁from ▁Sri ▁L anka ▁to ▁India ▁via ▁the ▁bridge ▁after ▁his ▁exp ulsion ▁from ▁the ▁Garden ▁of ▁E den ; ▁leading ▁to ▁the ▁name ▁of ▁Adam ' s ▁Bridge . ▁Al ber uni ▁() ▁was ▁probably ▁the ▁first ▁to ▁describe ▁it ▁in ▁such ▁a ▁manner . ▁The ▁earliest ▁map ▁that ▁calls ▁this ▁area ▁by ▁the ▁name ▁Adam ' s ▁bridge ▁was ▁prepared ▁by ▁a ▁British ▁cart ograph er ▁in ▁ 1 8 0 4 . ▁ ▁Location ▁ ▁The ▁bridge ▁starts ▁as ▁a ▁chain ▁of ▁sho als ▁from ▁the ▁D han ush k odi ▁tip ▁of ▁India ' s ▁P amb an ▁Island ▁and ▁ends ▁at ▁Sri ▁L anka ' s ▁Mann ar ▁Island . ▁P amb an ▁Island ▁is ▁semi - connected ▁to ▁the ▁Indian ▁main land ▁by ▁the ▁ 2 - km - long ▁P amb an ▁Bridge . ▁Mann ar ▁Island ▁is ▁connected ▁to ▁main land ▁Sri ▁L anka ▁by ▁a ▁cause way . ▁The ▁border ▁between ▁India ▁and ▁Sri ▁L anka ▁is ▁said ▁to ▁pass ▁across ▁one ▁of ▁the ▁sho als , ▁const itut ing ▁one ▁of ▁the ▁short est ▁land ▁borders