3/6 Clare Balding explores the Longdendale Trail and why walking can cement a friendship.
BBC Radio 4 FM only
8/8 Nicholas Crane uses an Ordnance Survey map to lead him safely through the Highlands. (R)
Featuring the snow-white oryx, the long-legged jerboa and glow-in-the-dark scorpions.
BBC Two Wales only
Sunday 24 February 2013