An amateur archeologist dubbed the British Indiana Jones claims the worlds greatest relic is hidden in a secret crypt in Hounslow, West London. Barrie-Jon Bower, 40, believes the Knights Templar captured the Holy Grail during the Crusades and brought it back to a crypt secreted away by a weir at the man-made Duke of Northumberlands River, according to the Sun. MORE ON: ENGLAND Not so jolly holiday: London faces 3rd lockdown amid new COVID strain Inside the 72-acre farm rumored to be Pippa Middletons new home Hardcore travel junkies are already planning excessive revenge vacations Legendary spy novel author John le Carr dead at 89 Bower spent the last few years studying the Templars and was so convinced, he has received permission from the Environment Agency, which will divert the river so they can bring in special equipment to survey the riverbed. The archeological enthusiast has invested thousands of dollars into his own ground-penetrating radar equipment to prove his theory early next year. When I find it, its going to be one of the greatest finds in history the biggest discovery of mankind, he told the Sun. Now Ive been in the water its made me more certain. It feels hollow. It feels right. Theres something underneath. Why not Hounslow? Legend has it that the Grail the cup Jesus drank from at the Last Supper holds immeasurable power and has been sought throughout the centuries by many including treasure hunters, archeologists and the Nazis.