Rana Mitter considers the legacy of the August 1920 Soviet march on Warsaw.
BBC Radio 3
3/3 Writer Daniel Alarcon visits a ghost town and Lima as he explores migration in Peru.
2/3 Writer Edgardo Cozarinsky visits Buenos Aires to explore the popularity of psychoanalysis.
1/3 Author Juan Gabriel Vasquez visits Bogota to show what has inspired his writing.