Why cant i find site_perl directory in Ubuntu?

Why cant i find site_perl directory in Ubuntu?

I am compiling a program from source code. It requires path to my site_perl directory. When I run perl -V, i see that there is /usr/local/lib/site_perl at the end but i cant find the directory in the path. So, I am confused what path to provide for site_perl. Can anyone help me or direct me to related reading?
$perl -V
...........
  @INC:
/etc/perl
/usr/local/lib/perl/5.14.2
/usr/local/share/perl/5.14.2
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.14
/usr/share/perl/5.14
/usr/local/lib/site_perl
Thanks!!