construction equipment construction vehicle danger Dirt equipment grip grooves heavy duty machine machinery mobility movement power ribs ridges slow Soil strength track traction Balearic Islands boulders cloud eroded erosion green hard harsh landscape majorca natural nature ridge rock rocky sky Spain trees view wild wilderness worn austere bleak countryside cumbria England english Eskdale fell Great Britain hills landform moorland road spring stern cold cover far freezing icy isolated melt melting mountain norway norwegian patchwork patchy snow snowy summer thick white homes houses deep mountains plateau remote water cliff home house shadow chalk downland exercise farm field grassland hill meadow national park Sussex trail walk