A tourist walks down "the narrowest street" in Prague, capital of Czech Republic, Nov. 20, 2018. A historical city, the Czech capital is decorated with many medieval monuments. Along the Voltava River, the Old Town, the Lesser Town and the New Town were built between the 11th and 18th centuries. The Historic Centre of Prague was included in the UNESCO World Heritage List in 1992. (Xinhua/Zheng Huansong)