Far inland from the tropical beaches of Brazil's Bahia state lies an ancient escarpment that juts up into Bahia's vast interior. Host David Yetman takes us on a tour of the Chapada Diamantina, once a rich source of diamonds, now an increasingly popular recreational region. The sheer cliffs and steep mountainsides intercept moisture from the distant Atlantic. The resultant rainfall brings flows into the arid sertão and waters the great swamp where runaway slaves hid from their owners.