The Bowder Stone, Grange in Borrowdale, the Lake District, Cumbria.
Some think this 11m tall, 1,250 ton boulder, precariously balancing on a narrow edge is an erratic (a glacial deposit), but most believe it has simply become dislodged and fallen down the hillside. In 1798 a Keswick eccentric called Joseph Pocklington saw tourist potential in the stone. He built a cottage and small chapel there, then drilled a hole through the base of the rock and encouraged visitors to shake hands underneath it. He also erected a Druid Stone nearby.