The valley: Affords walks through shady woodland with the opportunity to spot resident birds and mammals! Valid: Mon-Sun 10am-4.30pm. Heritage park: Enjoy the day with an entry ticket to Greenfield Valley Heritage Park. Tickets: Get a child, adult or family ticket which is for two adults and three children! Location: Located in Holywell. Playground: Plus, a fun playground for the kids to enjoy and don't forget about the animals roaming around the grounds! Greenfield Valley: Boasting 70 acres of history, Greenfield Valley Heritage Park welcomes everybody to discover it's history with abbeys from as far back as the 19th Century. Greenfield Valley Heritage Park Entry | Regional | Living Social