If you have 2 days to spend in East Grinstead, there are a few things you can do:
Standen House and Garden is a beautiful National Trust property that dates back to the 1890s. The house has a stunning arts and crafts interior, and there are lovely gardens to explore. Allow around 2-3 hours for a visit here.
Sackville College is a historic almshouse that was founded in 1609. It has a beautiful chapel and gardens, and a museum that displays artefacts and documents related to the college's history. Allow around 1-2 hours for a visit here.
Ashdown Forest is a large area of heathland and woodland that inspired A.A. Milne's Winnie-the-Pooh stories. It's a great place for a walk or a picnic, and there are plenty of trails to follow. Allow as much time as you like for a visit here.
The Bluebell Railway is a heritage railway line that runs steam trains between East Grinstead and Sheffield Park. It's a great way to experience the beauty of the Sussex countryside. Allow around 2-3 hours for a round trip on the train.
There are a few options for places to stay in East Grinstead. The Felbridge Hotel and Spa is a 4-star hotel with luxurious rooms and a spa. The Old Mill House is a charming bed and breakfast with comfortable rooms and a lovely garden. The Grange is a budget-friendly hotel with simple rooms but a great location in the centre of town.