Johannes de Ram, founder of villa Heidetuin and patron of Lievensberg estate died in 1888. Since then, Johannes's heirs have been searching for the property papers he hid before his death. To prevent anything happening to the estate, Johannes wanted only a true naturalist to be able to find the ownership papers. Therefore, he hid 10 keys in the landscape with tasks that can only be solved by a full-fledged successor. Can you crack Johannes' code and find the ownership papers within the time limit?