Parks & Gardens UK is an online resource dedicated to the heritage of historic parks, gardens and designed landscapes across the United Kingdom. Its freely accessible archive supports heritage preservation, academic research, professional garden design and personal interest by bringing together information about places, people and organisations connected with these landscapes. The collection includes records of almost 10,000 sites and more than 2,400 biographies, with additional information and locations added as material becomes available.

Visitors can explore sites through map-based searches, browse indexes and county listings, and discover historical and contemporary profiles, garden-history resources, a glossary, news and events. The site also covers conservation and management, including conservation plans, landscape protection and practical projects. Its educational and research materials include guidance on research and recording, school resources and themed projects.

Parks & Gardens UK invites contributions and donations to help develop the archive for future generations. The website notes that it has no statutory authority over planning or permissions, and that a site's inclusion or absence does not indicate its historic significance. It is associated with the Hestercombe Gardens Trust.