Meridian stone

The Meridian stone sits just outside Spalding, marking the spot where the Greenwich Prime Meridian actually passes through Lincolnshire. It's a modest affair - not some grand monument, just a stone marker planted in the landscape to show you're standing on zero degrees longitude. The sort of thing that sounds dull until you're actually there, realizing you can stand with one foot either side of the imaginary line that divides east from west.

Historically minded visitors will find it satisfying, particularly anyone interested in navigation or cartography. Photographers might enjoy the novelty shot. But be honest - you're not looking at a structure, just a marker. It takes about fifteen minutes to visit, tops, which is fine if you're in the area anyway.

Paired with a stay at Laurel Park Campsite just down the road, it makes a worthwhile detour on a Lincolnshire holiday. Spalding itself is close by and offers proper fenland charm - the town's known for tulips and waterways, so you can easily combine this with exploring the Fens. It's the sort of stop that works better as part of a wider itinerary than as a destination in itself. Kids might find the concept interesting for a few minutes, though there's no visitor centre or amenities to speak of.

Go if you're passing. Don't plan a trip around it. That's the honest take.