Possible Clues:

• Prehistoric ruin on Salisbury Plain
• A female replaces article in platform at old monument
• Wiltshire monument
• Salisbury Plain monument
• Site near an outdoor recording session in 'Help!'
• Wiltshire attraction
• Rock group that's been around for a long time
• Antique stones set in a ring
• Druid comes here for a change - he gets none
• Ancient monument site