There is often no need for a huge barrier to keep people or livestock in or out. A narrow piece of red tape stretched between posts keeps horses in a field, a kerb raised just a few inches keeps people on the pavement and cars on the street. A Ha-Ha will keep farm animals from straying into your beautiful new garden. There’s a horizontal line just behind the urn in the header photo above. That’s the Ha-Ha. Here’s the official description on a sign at Levens Hall in Cumbria, England.