Glasgow Doors Open Days Festival

Four days, hundreds of buildings, all free — the 37th edition of Glasgow's Doors Open Days unlocks everything from grand civic halls to working spaces you'd never normally get into, with guided tours and talks led by people who actually know the buildings.

Run under Scotland's nationwide Doors Open Days banner, which commits every event to being accessible to all — a properly sociable, wander-in-alone-and-end-up-chatting kind of festival, and completely free.