The World Champion in Gold Panning Dirk Mehlhorn prospects gold nuggets from a bucket of sand during the International Championships in Gold Panning in Zlotoryja, Poland on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

A case with gold findings is pictured during the International Championships in Gold Panning in Zlotoryja, Poland, on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

Tourists visit the old gold mine Aurelia during the International Championships in Gold Panning in Zlotoryja, Poland on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

Participants prospect gold nuggets from a bucket of sand during the International Championships in Gold Panning in Zlotoryja, Poland on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

A Tourist visits the old gold mine Aurelia during the International Championships in Gold Panning in Zlotoryja, Poland on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

Gold prospector Roman Drozd shows his most valuable finding - a 4 gramms nugget - during the International Championships in Gold Panning in Zlotoryja, Poland on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

Gold prospector Roman Drozd shows his findings during the International Championships in Gold Panning in Zlotoryja, Poland on May 28, 2016. Every year, with the arrival of warm weather, gold diggers from around the globe converge on the Kaczawa river in Poland's gold rush capital Zlotoryja to try their luck at panning. / AFP PHOTO / PIOTR HAWALEJPIOTR HAWALEJ/AFP/Getty Images

WINDSOR, ENGLAND - JUNE 13: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Order of the Garter Service at Windsor Castle on June 13, 2016 in Windsor, England. Today the traditional Garter parade was cancelled in favour of dignitaries arriving in cars due to the inclement weather. (Photo by Chris Jackson/Getty Images)