Mining has made changes to the landscape, but only one uranium mine (Ranger) remains. Mine operators are have to repair and replant the area when the mine closes. Some small scale logging took place in the early part of the 20th century, but little evidence of this remains. Tourism causes big changes to Kakadu National Park with hundreds of thousands of visitors arriving annually. Roads, tracks, signs, shelter, accommodation, telecommunications and other services must be provided to support this activity.