If you have 6 hours to spend in South Holland, there are a few things you can do:
1. Visit Ayscoughfee Hall Museum and Gardens - This historic building and its surrounding gardens are a must-visit in South Holland. You can spend around 2 hours exploring the museum and its exhibits, and then stroll around the beautiful gardens for another hour or so.
2. Explore the market town of Spalding - Take a walk around the town and visit the local shops, cafes, and restaurants. You can also stop by the famous Spalding Flower Parade garden, which is open year-round.
3. Take a boat ride along the River Welland - For a unique perspective of the town and its surroundings, take a boat ride along the river. You can book a 1-hour boat ride and enjoy the scenery.
4. Visit Pinchbeck Engine Museum - This small museum is dedicated to the history of steam engines and is worth a visit for history buffs. You can spend around 1 hour exploring the exhibits.
5. Take a walk on the Wash - If you have some time to spare, take a walk on the sprawling saltmarshes of the Wash. It's a beautiful sight and a great place to relax.
Overall, you can comfortably visit 2-3 of these attractions in 6 hours, depending on your pace and interests. Enjoy your visit to South Holland!