Yangtze Delta architecture at risk, experts say

WUXI, Jiangsu Province: Most of the villages in the Yangtze River Delta were once as beautiful as any on UNESCO's World Heritage list.

That was before the wave of modernization crashed on the delta, sweeping away valued parts of its past.

As it sailed into the 21st century, the delta found itself transformed into China's richest region. Only recently have local people come to realize what they lost. And they have decided they cannot afford to lose more.