What's on Events Hettie Hedgehog’s Great Adventure Follow Hettie the hedgehog’s trail as she wakes from hibernation this spring. Reunite her with her animal friends at Wheal Martyn as you explore the nature trail and woodlands.Time: 10.00am to 4.00pm each dayPrice: Included in standard museum admissionContact: [email protected] Location: Wheal Martyn grounds Manage Cookie Preferences