Mount Rushmore climbers to monitor and seal cracks annually. Due to budget constraints, the memorial is not regularly cleaned to remove lichens. However, on July 8, 2005, Alfred Kärcher GmbH, a German manufacturer of pressure washing and steam cleaning machines, conducted a free cleanup operation which lasted several weeks, using pressurized water at over . The flora and fauna of Mount Rushmore are similar to those of the rest of the Black Hills region of South Dakota. Birds including the turkey vulture, bald eagle, hawk, and meadowlark fly around Mount Rushmore, occasionally making nesting spots in the ledges of the mountain. Smaller
Mount Mansfield State Forest is listed as a National Natural Landmark. Vermont Route 108 between Stowe Mountain Resort and Smugglers' Notch Resort is a federally designated Scenic By-way. Mount Mansfield State Forest Mount Mansfield State Forest covers in seven towns in Chittenden, Lamoille and Washington counties in Vermont. The towns are Bolton and Underhill in Chittenden County, Cambridge, Johnson, Morristown and Stowe in Lamoille County, and Waterbury in Washington County. Mt. Mansfield State Forest is the largest contiguous landholding owned by the Vermont Department of Forests, Parks and Recreation. There are four state parks located in the forest: Little River State Park, Smugglers' Notch