If you have 6 hours or half a day to spend in Letchworth, there are several things you can do:
1. Visit the Letchworth Museum & Art Gallery: This museum showcases the history, culture, and art of Letchworth. You can spend around an hour or two here.
2. Explore Broadway Gardens: One of the most popular parks in Letchworth, Broadway Gardens is an ideal spot for a picnic, a leisurely stroll, or simply unwinding. It can take you an hour or two to explore the park depending upon your interests.
3. Take a walk along the Letchworth Greenway: A linear park stretching across Letchworth, this path offers scenic walking or cycling routes. You can spend an hour or two (or more) depending upon your time and interests.
4. Visit the Garden Square Shopping Centre: Letchworth's main shopping centre with a range of high-street shops, cafes, and restaurants. You can spend an hour or two exploring the shops and grabbing a bite to eat.
5. Check out the Letchworth Outdoor Pool in summer season: A great spot to cool off from the heat or burn some calories with a swim. You can spend a couple of hours here.
6. Head to Standalone Farm: A working farm with a variety of animals and activities, Standalone Farm is perfect for families with young kids. You can spend around 2-3 hours here.
Overall, how you choose to spend your time will depend on your interests, but these are just a few ideas to get you started.