London (CNN) Europe is under the spell of an exceptional heat wave that has pushed temperatures to record highs in some places and sparked massive wildfires from Greece to Arctic Sweden.

But the sweltering heat has had some unexpected results, uncovering architecture and more that had been lost to the long grasses of history. Gardens, ghostly mansions and even grenades have all emerged from Europe's parched landscape as the sun scorches the continent's lawns, fields and scrubland.

In Ireland, yellowing fields are unearthing ancient archaeological monuments, while wildfires uncovered aerial navigation aids from World War II.

Yellowing fields in Ireland have exposed markings of prehistoric ruins along the River Boyne.

Drone imagery above the world-famous Neolithic tombs at Newgrange in County Meath has revealed a string of further monuments. The pictures show circular markings etched into the landscape, which experts believe may show ancient ceremonial sites and a prehistoric mortuary.

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