This week's theme: the natural world

Big River by Johnny Cash,
East of the River Nile by Augustus Pablo,
Take Me to the River by Talking Heads,
We Are Floating by Archie Bronson Outfit,
Deep River by Aston "Family Man" Barrett,
Salt Creek by Pronghorn,
Green River Blues by The Reverend Peyton's Big Damn Band,
Paradise by John Prine,
American Interior by Gruff Rhys,
Desert Song by Edward Sharpe and the Magnetic Zeros,
Desert Delight by Max Pashm,
A Forest by The Cure,
Jungle by Lee "Scratch" Perry,
Cumbion Mountain (Cico Sonido and Toy Selecta) by Up Bustle and Out,
Mountain Jumper by [dunkelbunt],
Cumberland Gap by Rising Appalachia,
Running Up That Hill by Kate Bush,
Twyford Down by Galliano,
The Eiggy Sea by Cate Le Bon,
Wade Into the Water by Alabama 3,
Plastic Beach by Gorillaz,
Skylarking by Horace Andy,
Blackbird Singing by The Paragons,
Golden Clouds by The Orb and Lee "Scratch" Perry,
Bron-Y-Aur Stomp by Led Zeppelin,
Take Me Home, Country Roads by Toots and the Maytals,
Trans Island Express by Peatbog Faeries,
This land is Your Land by Sharon Jones and the Dap-Kings