Eden Project Entrance for Two - Key InfoVoucher Validation Your voucher is valid until 01 Jul 20 You must validate book and use your voucher within the voucher expiry date.Duration: You can spend as much time as you wish at the venue during opening hours.Group Size: This voucher is valid for two adults.Weather Dependent: NoSpectators: You're welcome to bring spectators however they will have to pay for admission on the day.Restrictions and Considerations: There will be some walking involved around the site.The minimum age is 18 years.Requirements: There are no qualifications required.Availability: The Eden Project is open Monday to Sunday throughout the year except Christmas Eve and Day. Limited January - February availability.