Stonehenge

The world's most famous prehistoric monument, a ring of huge standing stones on Salisbury Plain, built in stages from about 3000 BC; some of the stones were brought from Wales, 250 km away. Its purpose is still a mystery, but it's aligned with the sunrise at the summer solstice and the sunset at the winter solstice.

A shuttle bus runs from the visitor centre, with its exhibition and reconstructed Neolithic houses, to the stones. Visitors normally keep to a path around the circle; special early or late visits inside the circle can be booked. Avebury, a larger stone circle you can walk among, is nearby.