This low-lying reserve by the Knobley Brook is a mosaic of wet and dry grasslands and streamside Alder woodland.

There is a 12th century motte and bailey castle and a bronze age barrow.

The reserve is particularly lovely from April, when the Marsh Marigold comes into flower, to June, when some areas are thick with Heath Spotted Orchid.

In autumn the Pink Waxcap fungus is found in the shorter grass. 39 species of breeding birds have been recorded.

Butterflies include Dark-green Fritillary, Orange Tip, Speckled Wood, Small Heath and Ringlet. Otters visit the brook.

Opening Times Open throughout the year Admission Charges Admission is free but donations are welcome. Location Between Evensjobb and Walton Directions The entrance is 150m S of the turning to Burfa and Barland on the minor road running SE from Evenjobb to Ditchyeld Bridge on the B4362 N of Walton. Park on the verge by the gate, clear of the bend. The trail around the reserve is very level, with boardwalks across the wetter areas. Cattle graze here, so please keep your dogs on a lead. Telephone 01597 823298 Website: www.radnorshirewildlifetrust.org.uk The BBC is not responsible for the content of external websites.