Keswick is the busiest tourist center in the Northern Lakes area and a hub for all types of outdoor activities ranging from walking to water sports. There are several walking trails that wind their way through the hills, including the long distance Cumbria Way and the hilltop climbs to Catbells and Castle Crag, which makes Keswick a popular walking base. It is also famous as the place where graphite was discovered in the 16th century, and for inventing the lead pencil. The pencil was first mass produced here, and the Pencil Museum explores its history through a variety of unique exhibits. The museum houses a reconstruction of a graphite mine as well as the largest pencil in the world, measuring 8 meters from tip to end. The Cars of Stars Motor Museum is a must see for auto enthusiasts. It has a fleet of celebrity vehicles including Herbie the Love Bug, a Batmobile, Chitty Chitty Bang Bang, Kitt from Knight Rider, the A Team van, and the Delorean from Back to the Future. The Keswick Museum and Art Gallery opened in 1898 and is decorated in a Victorian style. It has a strange mix of exhibits, including a 500 year old cat and a geological piano.