If you have 24 hours to spend in Gravesend, there are plenty of things to do and see. Here are some suggestions:
1. Visit the Gravesend Promenade and enjoy the view of River Thames. This should take around 1 hour.
2. If you like history, visit the Gravesend Borough Market and clock tower. This should take around 1 hour.
3. Take a walk to the beautiful Jeskyns Community Woodland and explore the nature. This should take around 2-3 hours.
4. For animal lovers, Kent Cyclopark is a great place to spend some time watching bikers and also has a zoo you can visit. This should take around 2-3 hours.
5. Visit one of the local museums - such as the New Tavern Fort, where you can learn about military history and see some cannons. This should take around 1-2 hours.
6. After a long day exploring, check out one of the local restaurants or pubs. Gravesend has a variety of cuisine options to choose from.
Overall, there is plenty to see and do in Gravesend and surrounding areas with 24 hours to spare. Enjoy!