Orangery

The Orangery sits near Grantham as a proper bit of Georgian architecture - the kind of building that makes you understand why the landed gentry were so obsessed with showing off. It's a glasshouse, essentially, but built with the kind of craftsmanship you don't see much anymore. Stone pillars, tall windows, and that particular blend of practicality and vanity that defined 18th-century country estates.

Visiting involves a straightforward walk around the exterior and through the interior if access permits - call ahead, as opening arrangements aren't always consistent. You'll get a sense of how wealthy households cultivated exotic plants before central heating made such structures redundant. The bones of the place are impressive; the detail in the brickwork and ironwork rewards a proper look. History buffs will appreciate the engineering required to heat these spaces in winter. Families with older kids who can manage a gentle heritage site will find it interesting for twenty minutes or so, though you're not looking at a full afternoon's entertainment here.

It works well as part of a wider Lincolnshire exploration. If you're based at Wagtail Country Park just down the road - a solid four-star spot for families - the Orangery makes a decent morning diversion before heading elsewhere. The Grantham area has enough Georgian interest to string together a day trip without forcing it. Pack a coat; there's precious little shelter if the weather turns damp.