▁Gott es acker ▁plate au ▁form ▁a ▁ge ological ▁window ▁through ▁which ▁the ▁next ▁oldest ▁rock ▁below ▁the ▁fly sch ▁layer ▁( F ly sch de cke ) ▁comes ▁to ▁light . ▁ ▁S out he astern ▁Wal sert al ▁Mountains ▁ ▁The ▁subgroup ▁of ▁the ▁S out he astern ▁Wal sert al ▁Mountains ▁( S üd öst liche ▁Wal sert aler ▁Ber ge ) ▁is ▁bounded ▁in ▁the ▁north ▁by ▁the ▁Kle ine ▁Wal sert al ▁valley . ▁To ▁the ▁east ▁and ▁sout heast ▁are ▁the ▁valle ys ▁of ▁the ▁St illa ch ▁and ▁the ▁R appen al pen bach . ▁The ▁Ü nt schen ▁Pass ▁connect s ▁the ▁S out he astern ▁Wal sert al ▁Mountains ▁with ▁the ▁North western ▁Wal sert al ▁Mountains . ▁The ▁Sch ro fen ▁Pass ▁is ▁the ▁bridge ▁to ▁the ▁central ▁chain ▁of ▁the ▁All g äu ▁Al ps . ▁The ▁highest ▁mountain ▁in ▁the ▁subgroup ▁is ▁the ▁W id der stein , ▁ 2 , 5 3 3   m . ▁ ▁The ▁range ▁is ▁home ▁to ▁the ▁well - known ▁h ik ing ▁and ▁ski ing ▁area ▁of ▁the ▁F ell horn ▁and ▁K anz el wand ▁ski ▁lif ts ▁and ▁the ▁famous ▁Mind el heimer ▁K letter ste ig . ▁Very ▁popular ▁areas , ▁such ▁as ▁the ▁F ell horn ▁or ▁in ▁the ▁vic inity ▁of ▁the ▁Mind el heimer ▁H ut , ▁contrast ▁with ▁areas ▁of ▁greater ▁sol itude ▁opposite ▁in ▁the ▁mountains ▁n ortheast ▁of ▁the ▁F ider esch arte ▁col