The Tynwald National Park and Arboretum (Phairk Ashoonagh as Garey Biljaagh Tinvaal) is in the village of St Johns (Manx: Balley Keeill Eoin). Access is by bus or car, with parking at the entrance. There is car park on the right side when driving from the east into the village just before St John's Church.
The Arboretum forms an attractive backdrop to Tynwald Hill and covers an area of about 25 acres, which divides up into three sections.