HIDDEN deep in the hills, the gates to a secret garden have been unlocked once again to allow the public to see the treasures that are kept within.

Covering nearly 130 acres, the Castle Howard Arboretum, near Helmsley, boasts an outstanding collection of rare trees and shrubs for all to admire.

The extensive collection of rare species is protected by the Castle Howard Arboretum Trust, formed by the Castle Howard Estate and the Royal Botanic Gardens at Kew.

Now in its 27th year, the garden continues to develop and grow, with additional features being introduced annually.

New to the glorious surroundings this year is the Bird Observatory, which has been built using traditional skills and local products - including timber from the Arboretum itself. Other projects include the regeneration of the second lake and the completion of the rockery garden. The Arboretum is open to the public every Wednesday, Friday, Saturday, Sunday and Bank Holidays. The entrance is to the west of the Gatehouse Archway.