Heritage Open Days
11–20 September 2026
England's national festival of free heritage access. The official 2026 search currently lists thousands of site openings, walks, talks and behind-the-scenes visits.
Open Heritage Open Days ↗Usually locked, ticketed or overlooked
Proper free-entry dates for museums, historic houses, archives, industrial sites and buildings that are normally paid or closed. Every highlighted event links to its official listing, because “probably free” is how wallets get mugged politely.
Source-checked highlights
Checked 26 July 2026
Whole-UK coverage
Unfleeced highlights a manageable set of checked openings. These official directories are the complete programme sources and remain the final authority for availability, booking and cancellations.
11–20 September 2026
England's national festival of free heritage access. The official 2026 search currently lists thousands of site openings, walks, talks and behind-the-scenes visits.
Open Heritage Open Days ↗5–27 September 2026, by area
Four official weekends of free access across Scotland. Participating council areas run on different weekends, so check the area timetable before travelling.
Open Scottish Civic Trust — Doors Open Days ↗September 2026
Cadw's annual programme offers free entry, events or guided tours at more than 200 historic sites, landmarks and places that are sometimes normally closed.
Open Cadw — Open Doors ↗12–13 September 2026
Northern Ireland's once-a-year opportunity to explore historic buildings and exclusive sites rarely open to the public, with talks, tours and activities.
Open Department for Communities Northern Ireland ↗Make a free weekend of it