Hari Sreenivasan:

In October 2015, I went for a walk in the Southern Caucasus Mountains with the journalist Paul Salopek. For me, it was a few days. For him, he had been walking nearly three years as part of his Out of Eden Walk, a global journey by foot.

We spoke with him in Kazakstan last year and when he was in Kyrgyzstan earlier this year.

And Paul joins me again now.

Paul, tell me where you're at. I can hear a river rushing in the background.