manitoba map

http://emilianotvhz698.bravesites.com/entries/general/find-fault-with-that-unpleasant-golf-course-sand-trap--shelter-on-scottish-sheep

Sand Traps on golf courses-- better called "Bunkers" create excellent difficulty for a lot of golf players. Just how is that these demons came about to be the scourge of many regular golf players?