The Heritage Open Days are a chance to look around places not normally accessible to the public.
*One of those places is *The Curat House in Norwich. From the outside it looks like a modern day shop face, but inside it houses one of the city's many unseen undercrofts.
– Richard Foster - Asst Manager, Fatface
"It gives us a sense of pride having such a fantastic building, that's why we agreed to open it up to the heritage tours because it's not been able to access it in the past.
That's what Heritage Open Days are all about - getting to see places you might not even have known existed.
Beneath the magistrates courts in Norwich lies a 12th century house - preserved during building work in the 1970's
– Sophie Cabot - Norwich HEART
"It's not the sort of thing you normally get to see. Normally only people who work as archaeologists get to see remains like this that have been excavated in the middle of a city centre. This is something really special. It's the full layout of the buliding, you can get a really good impression of what it was like to live here and get the impression of what it would have looked like in the city in the middle ages"
Other buildings opening their doors include the likes of the medieval Great Hospital - still used as a nursing home.
And there's a chance to see parts of the Maids Head hotel - without spending a penny.
"But the heritage open days aren't just all about old buildings. For example, how often do you get to sit in the Bishop of Norwich's garden for free?"
The bishop would approve that 31 of Norwich's 32 churches will be open too.
– The Rev Canon John Minns - St George's Church, Norwich
"There are more medieval churches in Norwich than in any other Northern European city. It's an open church, it's our responsibility to keep the doors open to welcome all comers and by that I mean everybody."
There are places open right across Norfolk including Thetford and Yarmouth. A chance to see some of our hidden heritage that is often right in front of our eyes.