If you have 24 hours to spend in Cornwall, there are several things you can do. Here are some suggestions:
1. Visit the Eden Project - This world-famous ecological attraction features two enormous biomes filled with various plant species, and is definitely worth a visit. Plan to spend anywhere from 2-4 hours here.
2. Stroll through the Lost Gardens of Heligan - This historic garden was once lost but has since been restored, and is now open to the public. Spend a leisurely 3-4 hours exploring the various gardens and sculptures.
3. Check out the Minack Theatre - This open-air theatre carved into the cliffs has stunning views of the ocean and stages a variety of performances throughout the season. Depending on the show schedule, you can visit for a tour or even catch a performance, which can range from 1.5-3 hours.
4. Explore St. Michael's Mount - This iconic tidal island is home to a castle and beautiful gardens, which can be accessed via boat or on foot. Plan for at least 3 hours here to fully appreciate the island's history and natural beauty.
5. Visit the Tate St. Ives - This contemporary art museum offers breathtaking views of the beach and constantly curates new exhibitions. Plan for at least 2 hours here to peruse the various artworks on display.
Overall, the places mentioned above are some of the top attractions in Cornwall and can easily fill up a full day of exploring.