Four Corners of the Earth
NORTH
Depart the above coordinates on a heading of true north and travel precisely halfway around the Earth then continue on a heading of true north for an additional 100 meters to arrive at Point A.
SOUTH
Depart Point A on a heading of true south and travel precisely halfway around the Earth then continue on a heading of true south for an additional 100 meters to arrive at Point B.
EAST
Depart Point B on a heading of true east and travel precisely halfway around the Earth then continue on a heading of true east for an additional 100 meters to arrive at Point C.
WEST
Depart Point C on a heading true west and travel precisely halfway around the Earth then continue on a heading of true west for an additional 100 meters to arrive at the cache.
You can check your answers for this puzzle on GeoChecker.com.
Congratulations to bmzdaddy for First To Find