Some of the buildings aren't usually open to the public, giving people a rare chance to get a glimpse inside. Heritage Open Days is celebrating its 25th anniversary this year and as well as the buildings that are opening as part of the event, there will also be a talks and other celebrations. Full details here.

5. Leawood Pump, Cromford
Take a tour of the Leawood Pumphouse on September 14 and 15 from 12noon to 4.30pm.
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6. Middleton Top Engine House, Middleton by Wirksworth
The last surviving complete winding engine house built by the Cromford & High Peak Railway Co will be open from 1pm to 4.30pm on September 15.
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7. Buxton Opera House
Learn more about the history of the stunning Frank Matcham Theatre on September 21, from 11am to 3pm
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8. Padley Chapel, Manor Gatehouse and Martyrs Shrine
The medieval gatehouse will be open from 11am to 4.30pm on Sunday September 15.
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