Grebenac Serbia Deliblatska Peshchara Special Nature Reserve

In 1789, Austrian authorities, which controlled the area at the time, dispatched forest engineer Franz Bachofen from Timișoara to conduct measurements of the sands and complies a report on how to "tame" the sand. At the time, strong winds and storms would carry the sand from Deliblato all the way to Vienna and Pest. After a decade of work, Bachofen reported that the sands cover an area of 406.60 km2 (156.99 sq mi), out of which 168 km2 (65 sq mi) is covered with loose, free sand. In order to immobilize the sand, Bachofer drafter a forestation plan, which was accepted in 1818.