A quiet walk through an abandoned prison camp in darkness, late night ambient sound in the Maasai Mara - Josie Long listens for sounds in the hush of the night.

Silent NightFeaturing Carl CattermoleProduced by Thomas Glasser and based on his documentary for National Prison Radio, Sounds Inside

Crickets - Night - Maasai MaraProduced by Jonathan Zenti

Ambient SirFeaturing Jordan ScottJordan Scott's writing can be found at his website Lanterns at GuantánamoProduced by Jess Shane

Series Producer: Eleanor McDowall

A Falling Tree production for BBC Radio 4 first broadcast in March 2018.