Events & Activities What's On/Events Bourn Windmill Open Day Sunday 30 July, 2pm-4.30pm Bourn windmill is one of the oldest in the country, set in beautiful scenery. The mill will be opened and guides will show you how the mill works and tell you the history of this fascinating building. Last tour at 4pm. Not only can you see inside, you can also have a go at the incredible task of turning the whole mill on its post - an amazing experience. The mill is owned by local charity CambridgePPF and run by dedicated volunteers. Tea and cakes available to purchase. Members free, non-members £3 adult, £1 per child. No need to book. Manage Cookie Preferences