The ongoing warm and dry summer across southern England has led to the uncovering of historical sites through parched earth on lawns and fields. These "parch marks" reveal the outlines of long-demolished structures and garden designs, offering glimpses into the past.

Notable sites where these historical footprints have emerged include Portchester Castle and Blenheim Palace. At Blenheim Palace, the 18th-century garden, which once spanned the entire width of the palace grounds, has reappeared on a lawn.

Andy Mills, head gardener at the UNESCO World Heritage Site, described the phenomenon as "absolutely magical" to witness the outlines of the historic parterre, 260 years after its demolition. The original parterre, a French term meaning "on the ground," was constructed in 1705 and was an extravagant display of wealth and importance at the time.

Parch marks on a lawn in front of a modern hedge garden.

Similarly, at Portchester Castle, large parch marks have become visible on the lawns within the castle walls, showcasing the extent of historical features.

Large parch marks can be seen from Portchester Castle tower on a lawn within the castle's walls.

The dry conditions have also affected natural landscapes, with rivers like the Thames showing reduced water levels and surrounding vegetation turning yellow and brown.

The River Thames in Reading. There is yellow and brown grass on the left of the river with green trees visible across the picture.

These parch marks are caused by differences in soil moisture. Areas where ancient walls, ditches, or foundations lie just beneath the surface retain moisture differently than the surrounding soil, leading to variations in grass growth and color during dry spells.