Photo taken on Sept. 2, 2009 shows a post office in the Zanzibar Stone Town in Tanzania. The Stone Town, which used to be a trading center in East Africa, is a seashore city with winding alleys, bustling bazaars, mosques and grand Arab houses. Most of the houses are well preserved and constructions built in the 19th century still can be seen in the town. The harmonious combination of different cultures attract lots of tourists every year. The Stone Town was listed by the UNESCO in 2000 as a world cultural heritage site. [Xu Suhui/Xinhua]