If you have 6 hours or half a day to spend in Basildon, you should start by visiting the Wat Tyler Country Park. This beautiful park offers a variety of outdoor activities such as hiking and biking trails, wildlife spotting, and fishing areas. You can spend around 2 hours exploring the park and enjoying the serene atmosphere.
The next stop could be the Eastgate Shopping Centre, which has a range of shops, cafes, and restaurants to choose from. You can wander around the centre for a couple of hours and grab a bite to eat at one of the cafes there.
If you are interested in history and culture, head over to the nearby town of Pitsea and visit the Pitsea Market. This market has been running for over 80 years and offers a wide range of goods, including vintage items, antiques, and fresh produce. You can easily spend an hour or two browsing the stalls.
Finally, end your day by catching a movie or a show at the Cineworld Basildon. The cinema has a good range of films and shows on offer, and it shouldn't take you more than 2-3 hours to catch a show and head back home.