THE European Heritage Open Days will see more than 300 properties open their doors for free in a celebration of culture, heritage and architecture.
It is the 19th year that Northern Ireland has joined forces with 50 other countries across Europe for the European Heritage Open Days weekend.
This year the cultural heritage initiative will take place on Saturday September 10 and Sunday September 11.
The weekend programme includes walking tours and history re-enactments. More than 52,000 people took part last year, and while all events are free some require pre-booking.
Full details of the hundreds of locations and events are available on the Discover Northern Ireland website.
But with so much to choose from, here's a handy county-by-county guide highlighting some of what the north's six counties have to offer.
Antrim
Children's Puzzle Challenge, Belfast City Hall
September 10-11, 10am to 5pm
A chance for children to explore the city hall grounds and gardens and discover the heritage of Belfast, its people and industrial past.
The event also gives a chance to see a display of vintage motorcycles, from pre-First World War motorcycles to classic racers from the 1960s.
Larne Market Yard, Larne
September 10, 11am to 3pm
An open day with traditional crafts, living history characters, interactive workshops, talks and tours about the history of Larne Market Yard and its recent refurbishment.
Craft market stalls will be selling goods and refreshments will be available to purchase.
Armagh
Derrymore House, Bessbrook
September 10, 2pm to 5.30pm
The elegant 18th Century thatched cottage is part of the Ring of Gullion walking trail.
A new addition to the European Heritage Open Days, the demesne has fine elevated views and is ideal for
family walks.
Moyry Castle, near Kilnasaggart, Carrickbroad
September 10-11, 9am to 8pm
Built in 1601, the castle is set on a rocky height and overlooking Moyry Pass.
The small tower is three storeys high and features rounded corners, gun loops and a machicolation over the door.
Derry
Community of the Dead: A tour of Derry City Cemetery
September 10-11, 2pm to 4pm (tour both days at 2pm lasting two hours)
Opened in 1853, the cemetery became the main burial place for people from across the city, and three historical periods – Victorian, Edwardian and late-20th century – are reflected in the architecture and design.
Genealogist Brian Mitchell leads the tour that will include spectacular views over the Foyle and will provide many stories from the past.
The Bridewell, Church Street, Magherafelt
September 10, 10am to 4pm
New to this year's programme, the old gaol and courthouse was built by the Salters Company from London during the Plantation of Ulster.
A guided tour will provide a day of living history, taking you through the experience of what life was like for the prisoners.
Down
Hillsborough Fort, Hillsborough
September 10, 10am to 5pm, and September 11, 1pm to 5pm
Hillsborough Fort will be opened on the weekend by the Hillsborough Old Guard.
A collection of photographs and artefacts from the area will be on display at the fort.
Downpatrick and Co Down Railway, Downpatrick
September 10-11, noon to 5pm
Ireland's only full-size heritage railway, running vintage steam and diesel trains between Downpatrick and Inch Abbey.
This working railway museum with industrial and transport heritage exhibits includes free guided tours of the carriage viewing gallery and museum.
Fermanagh
Headhunters Railway Museum, Enniskillen
September 10, 9am to 5.30pm, and September 11, 11am to 5pm
The museum brings the golden age of steam engines to life and looks at the impact that railways had on people's lives in Fermanagh and the border counties until the closure of the lines in 1957.
There will be an exhibition of railway paintings and children will enjoy operating the large model railway.
Belleek Pottery Visitor Centre, Rathmore
September 10, 10am to 5.30pm, and September 11, 2pm to 5.30pm
Discover the secrets that have made Bellek Pottery one of the most enduring success stories of Irish craftsmanship.
Belleek Pottery offers one of the north's oldest attractions, with tours taking place for decades.
Tyrone
Castle Grove, Castlecaulfield
September 10-11, 10am to 5pm
The substantial remains of the English-style house, which was built in about 1619 on the site of the fort of the O'Donnellys.
Newly included in the programme this year, it features the Caulfield arms appear over the gatehouse as well as murder-holes and pistolloops.
Tullaghoge Fort, Tullywiggan Road, Tullahoge
September 10-11, open site
This hilltop enclosure came into historical prominence in the 11th Century when it was a dynastic centre and inauguration place of the Cenel nEogain, and later the O'Neills.
It was the residence of the O'Hagans who, with the O'Cahans, performed the inauguration ceremony.