The plunge pool is 40 thousand mm
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
View page
a plunge pool is a deep pool,lake or pond that often sits under
a waterfall. It erodes with the waterfall and becomes deeper as the
waterfall erodes more. It erodes stones and rocks in the plunge
pool
View page
I think you mean plunge pool. It is similar to a splash pool. IE
just a small pool you can plunge into just to cool off