Whats in a wall but a simple structure to keep intruders out, you might say.
But a surprising amount of thought goes behind the construction of some.
One example is thecrinkle-crankle wall, popular in the county of Suffolk, in east England.
The alternating curves of the crinkle-crankle wall prevents the wall from toppling over without the need for buttressing.
Another unusual wall is the quirkily named Ha-Ha thats found in many 18th century country estates around Britain.
Anyone who came across such a hidden wall will have exclaimed Ah!
Image:BBC
The gardens at Stowe were among the first in England to possess a ha-ha.
Aside from Stowe, you might see ha-has at many grand country houses and estates around the country.
Most of these date from the 18th century.
Modern landscape designers are making use of ha-has once again to create visually pleasing boundaries that do not obstruct.
There is one at the Washington Monument in Washington, the US, constructed in the early 2000s.
A ha-ha on the grounds of Hopetoun House near South Queensferry, in Scotland.
Photo:Andrew Shiva/Wikimedia Commons
Can you find the ha-ha in this photograph of the Berrington Hall in Herefordshire?
Photo:Stuartan/Dreamstime.com
A ha-ha in Petworth House, in West Sussex, England.
