Ha-ha

ha-ha
a sunk fence; that is, a ditch with one sloping side and one vertical side into which is built a retaining wall; a ha-ha creates a barrier for sheep, cattle, and deer while allowing an unbroken view of the landscape.

ha-haA Ha-Ha is a sunk wall with a ditch outside, used so that the garden boundary is not visible from within.

Ha-ha Hidden ditch used to keep out people or animals.
Halophyte Salt-loving or salt-tolerant plant.

bastion a projecting part of a rampart or other fortification; in landscape gardening, a bastion is a projecting section of the ha-ha.

See also: Plant, Flower, Scape, Landscape, Natural