The concept of pilgrimage as such is not really developed in Paganism, though Pagans may well visit places associated with Pagan practice such as Stonehenge, Avebury, or Glastonbury, especially at festival times.
The British Druid Order (BDO) promotes pilgrimage in their courses. Philip Carr-Gomm’s book, ‘The Druid Way’, also promotes the concept of pilgrimage. Some Pagans who visit Stonehenge for the solstice will engage in a pilgrims’ walk from Avebury to Stonehenge. With the placing of blue plaques on the homes of Doreen Valiente in Brighton and Gerald Gardner in Dorset, there is the possibility of pilgrimages to visit those sites.