Crinkle-Crankle Walls, Wheathampstead green plaque

This green commemorative plaque records: Crinkle-Crankle Walls Rare serpentine walls located east and west of the Old Rectory. The curving line gives strength, allowing them to stand high without buttresses and to expand without cracking in the sun. The curves trapped in the sun's warmth, encouraging the growth of fruit in the alcoves. Grade II listed Recorded plaque organisation: Wheathampstead Heritage.

Crinkle-Crankle Walls in Wheathampstead are unique serpentine structures known for their strength and efficiency in retaining heat, which historically enhanced agricultural productivity by warming fruit trees. These walls represent an innovative architectural solution from the 18th century, now recognized for their historical and aesthetic value, listed as Grade II.