Possible Clues:

• Rock laid where Jack Ketch worked
• Projecting beam of a crane
• Large turn - wager you'd be seen dead there
• Considerable rise with hazard for old lags
• Erected large stake or gallows
• Get over one bed and breakfast at The Gallows Tree
• Scaffold
• Giant lifted onto stake as means of execution
• Projecting beam or stake buried under rocky territory
• Rocky location with risk — one approaching it may be doomed