Local residents ride past the west gate of the Citadel of the Ho Dynasty in Thanh Hoa Province, Vietnam, June 13, 2013. The Citadel of the Ho Dynasty once was the capital of Vietnam's Ho Dynasty (1400-1407). The citadel, built according to the "feng shui" principles, sited in a landscape of great scenic beauty, represents a new style of south-east Asian imperial cities. After over 600 years, however, the citadel is left with nothing but the ruined city wall and gates.(Xinhua/Zhang Jianhua)