While parts of the United Kingdom were sizzled at the end of the mini-heatwave, one walker was stunned to stumble upon a bizarre snow tunnel in Northumberland, North East England. Paul Carr, 62, was trekking up the 1,600-foot- (500-meter-) high Cheviot Hills on the border between England and Scotland with his friend on May 29, when he came across a large snowdrift. A stream had caused the inside of the 5-foot-deep drift to hollow out, creating a natural igloo-type archway big enough to stand under. “My friend and I were walking up the Cheviot Hills and following the stream which was trickling down from the top,” Paul said, recalling the moment. “As we reached the back of the summit we saw this large snowdrift.” Paul, a printer from Whitley Bay, North Tyneside, said that although the day was really hot, there was one area where the sun didn’t reach so the …