Kota Tinggi pillbox dominates only route down east coast and is
on ridgeline middle of thick vegetation, however must have been
easily 'overrun' by inflitrating troops going around
location.
Kota Tinggi complek or correctly "Pegarang fort" (sic). It had an
AA battery, lookout towers plus protective pill boxes on hill
ridgeline; lookout and ranging towers for the guns of Changi costal
battery (so called johor battery) and intergrated with the other
facilities on Tekong (Camp I and II) and P Sajahat (small island in
between Tekong and Mainland). all part of the integrated defence
for southern Malaya.
From top of Pegarang, you can see all the eastern approaches out to
some 30km (depending on visability) and can easily spot shells for
the 'johor' battery as defence of fortress Singapore, worth a visit
if they allow you to climb the hill (not sure now bcause part of
RMN training facility??)