The Lost Treasure [Outdoor]

An outdoor Escape Game adventure, where the streets or trails bring you puzzles and challenges that only the most astute team will be able to solve. James Perry, a successful treasure hunter, died shortly after his latest discovery, a valuable piece weighing over 20 kg, in solid gold. Perry being a suspicious explorer, he kept the location of his conquests encrypted. After his death, relevant information was found that could lead to his now lost treasure... Since James Perry had no heirs it was publicly stated that whoever discovered the "Lost Treasure" within 90 minutes would be rewarded. Will your team be able to find out?