There are still several quarries on the Mendip Hills. Some of the stone is still carried by Mendip Rail; the other railways in the area closed in the 1960s. Although the Roman Fosse Way crossed the hills, the main roads generally avoid the higher areas and run along the bottom of the scarp slope on the north and south of the hills. The western end of the hills is crossed by the M5 motorway and A38. Further east, and running almost north to south, are the A37 and A39. A wide range of outdoor sports and leisure activities take place in the Mendips, many based on the particular geology of the area. The hills are recognised as a national centre for caving and cave diving, as well as being popular with climbers, hillwalkers and natural historians. Wookey Hole Caves and some of the caves in Cheddar Gorge are open as show caves; however, many of the caves of the Mendip Hills are only accessible to members of caving clubs. Long distance footpaths include the Mendip Way and Limestone Link.