The area around the brook formed the ancient natural boundary between Gomersal and Birtsall.

The parish retains its ancient boundaries, which reach from the village to the coast, and the major part of the population is in the two coastal settlements.

There are no known tectonic plate boundaries in the area but a very ancient boundary may be lurking in the area.

Look at the roads and lanes, are they straight or curving, following a buried stream perhaps, or some other ancient boundary?

The river is the ancient boundary between Glamorgan and Monmouthshire.

The ancient geographical boundaries of the Llandudno area are complex.

The river forms part of the ancient boundary between Lancashire and Cheshire.

The remaining traces of stone walls point out the ancient boundaries far above the secluded valley now in cultivation.

Anyway, the ancient boundaries of the estate stop a couple of kilometers from Wasserburg.

Brentford developed around the ancient boundary between the parishes of Ealing and Hanwell.