The Old Foundry Holiday Cottage is in Burgh le Marsh. It's a quiet village, not much going on, which is the point. You're about a ten minute drive from Skegness if you want the seaside stuff.
It sleeps four. Two bedrooms, one bathroom. It's got a 4 Star rating. Everything works, it's clean, and it's been done up to a decent standard. The kitchen is open plan.
There's a proper garden out the back. It's private. You get one parking space on the drive.
The village has a couple of shops and a pub. For anything bigger, you drive to Skegness. It's your classic British seaside town with a beach, amusements, and that. The Natureland Seal Sanctuary is there if you fancy it.
If you want to walk, the Lincolnshire Wolds are close. It's an Area of Outstanding Natural Beauty, so plenty of trails. The coast is flat and good for cycling. You can fish locally. There's a golf course nearby and you can arrange horse riding.
Inside, it's got a TV, WiFi, a washing machine, and a dishwasher. All bedding and towels are included. You can bring one dog.
Useful link for planning days out: Visit Lincolnshire.