You put a fence round an area of ground.
The Field of Vision was created in 1956.
The Wheat Field was created in 1889.
Field of Chaos was created in 1993.
PNC Field was created in 1989.
Forbes Field was created in 1909.
Citi Field was created in 2009.
Coors Field was created in 1995.
Grider Field was created in 1941.
Rankin Field was created in 1940.
Sequoia Field was created in 1941.
Happiness Is in the Field was created in 1995.
Cardines Field was created in 1890.