The actual site of where Rockfeller died is unknown.  But he probably drowned near where he tried to swim to shore.  The exact location of that site needs to be added.  The location here is along the coast where the Asmat territory was/is (Rockfeller was attempting to study the Asmat).

Michael Clark Rockefeller (born May 18, 1938; presumed to have died November 17, 1961) was the youngest son of New York Governor (later Vice President) Nelson Aldrich Rockefeller and Mary Todhunter Rockefeller and a fourth generation member of the Rockefeller family. He disappeared during an expedition in the Asmat region of southwestern Netherlands New Guinea.

• http://en.wikipedia.org/wiki/Michael Rockefeller