Heritage Open Days
/ˌherɪtɪdʒ ˈəʊpən deɪz/
/ˌherɪtɪdʒ ˈəʊpən deɪz/
- a number of days every year when people can visit places and buildings in Britain which are not normally open to the public. These places are of interest because of their history, architecture, or cultural importance.