Up to 40,000 people climb Croagh Patrick every year - a 760m-high mountain in the far west of Ireland - as part of a pilgrimage to honour the country's patron saint. It's one of Ireland's top tourist destinations and has become popular with runners. But not everyone is happy, including the Catholic Church.On a clear day you can see Croagh Patrick from miles away, its near perfect conical shape mirrored against the sky. Originally a site for pagan ceremonies, St Patrick is said to have climbed the mountain more than 1,500 years ago, fasting and praying for 40 days and...