Looking like a design amalgamation of a Roman coliseum and a doughnut, tulou buildings, found in China's southwest Fujian province, are some of the most stunning historic structures in the country. But many of these residential buildings, which feature a courtyard surrounded by a perimeter of homes that rise several stories high, are under threat. Although 46 of the largest and most important tulou have been listed by UNESCO as World Heritage sites, an estimated 3,000 remain in the province with no such status. Read more
