Buy tickets We no longer require visitors to book online, however you may wish to do so. When you book online we offer timed slots but once you arrive, you can stay as long as you like within our opening hours. Buy a ticket Ticket prices and offers See ticket prices If you are a Friend of Wheal Martyn or a member of the China Clay History Society, you can purchase free entry to the above organisations in January via their websites. Manage Cookie Preferences