Heritage Open Day: A tranquil wooded garden, surrounded by historic parkland, with a delightful walled garden at its heart. National Trust gardens open for free on Saturday 12 September. Hare Hill offers a tranquil space to escape, explore and unwind, away from the hustle and bustle. The Walled Garden provides a picturesque backdrop for a picnic outdoors and a perfect spot for watching the clouds roll by. Get closer to nature and venture to the bird hide, an ideal spot to start any outdoor wildlife adventure. To burn off some energy, let little legs loose in the natural woodland play area, where they can build, climb, balance and let their imaginations run wild.