Two circular walks around a newly erected fence and the old line between cut and uncut grass.

 Enclosure
 noun 
 Old French - enclos - closed in
 Similar - Paddock, fold, pen, compound, stockade, ring, yard, pound.
 An area surrounded by a barrier.
 A section of a racecourse for a specified activity or group of people.
 The state of being enclosed, especially in a religious community.
 The process or policy of fencing in wasteland or common land so as to make it private property, as pursued in much of Britain in the 18th and early 19th centuries.
 A document or object placed in an envelope together with a letter.

 Boundary
 noun
 Old French - bonde - a visible mark indicating a dividing line.
 Similar - Border, frontier, borderline, partition, dividing line.
 A limit of something abstract, especially a subject or sphere of activity.
 In Cricket, a hit crossing the limits of the field, scoring four or six runs.
 An entity demarcated from its surroundings. 
 Guidelines or rules or limits that a person creates to identify safe ways for other people to behave towards them. 

 Circumnavigate
 verb
 Latin - circumnavigare - to sail around
 Similar - Bypass, skirt, compass, circumvent, move around.
 To sail or travel all the way around (something, especially the world).
 Go around or avoid (an obstacle).
 Avoid dealing with (something difficult or unpleasant).
 The complete navigation around an entire island, continent, or astronomical body (eg. a planet or moon). 

Map created with free public ArcGIS account.