You put a fence round an area of ground.
Cardines Field was created in 1890.
Page Field was created in 1927.
The Gathering Field was created in 1994.
Rockwell Field was created in 1917.
Daniel Field was created in 1924.
Campus Field was created in 1993.
Ludwig Field was created in 1995.
Lambeau Field was created in 1957.
Marshall Field's was created in 1852.
Heinz Field was created in 2001.
Dugdale Field was created in 1913.
Ferry Field was created in 1906.