Heritage

Single-story, tiled-roof houses called hanok used to cover the footprint of Seoul, now a city of skyscrapers and avant-garde architecture. Today many describe the hanok as "endangered,"and conflict has come to a head in the small district of Bukchon.

Isfahan is one of Iran's fastest growing cities. But it also has a distinct history -- one that is being threatened by the rapid pace of growth. Now, locals are trying to preserve the city's heritage.