In downtown Kabul, Afghanistan, a bazaar still sells the rare natural ingredients used in the millennial art of natural vegetable dyeing.
Nathan Santamaria travels through the catacomb-like spaces of the market — and all of its chaos — with carpet expert Chris Alexander. He's on a mission to seek out the dye merchants and the roots, seeds and minerals necessary to fill out his color palette.
Click above to see more sights from the market.
A dye merchant's wares are displayed in Kabul's bustling Mandha-i Bazaar.