For a couple of weeks in September, thousands of buildings across the UK, mostly outside London, are open to the public.

The industry must have started much earlier for that locality-name to get established, and there are various buildings constructed of expertly split and shaped sarsen blocks dating to around 1800.

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The museum, a 45-acre site, features more than 30 historic buildings that were once the homes and workplaces of ordinary people. A blacksmith at Chiltern Open Air Museum (Image: Chiltern Open Air ...