('City oak planted in 1933 in place of the coat of arms oak'). Sights Książ Castle, the largest Silesian castle, the third-largest castle in Poland behind Kraków's Wawel Castle and the Malbork Castle Rebuilt in 1962-1964. Old Książ Castle (Stary Książ). Gothic ruins opposite (across a valley) Książ Castle Nowy Dwór Castle. The ruins of the castle Nowy Dwór (Ogorzelec) are on the top of Castle Hill (618 m) Czettritz Castle (1604–1628), now the Angelus Silesius State College Sanctuary of Our Lady of Sorrows. Gothic church, rebuilt into a Baroque style. Sanctuary of Our Lady of Sorrows placed in the center of Wałbrzych and is the oldest building of the city, called by the inhabitants "the heart of the city" Town Hall (Ratusz). A representative three-storey building maintained in the style of historical eclecticism, imitating gothic Palmiarnia (Palm House) Market square (renovated 1997–1999). A place where a weekly market took place in the past. In the years 1731-1853 its center was occupied by the Baroque town hall. Museum of Porcelain in the old Alberti Palace Guardian Angels Church. Built in 1898 in the neo-Gothic style as the , in place of a previous church. Protestant church. Designed in the years 1785-1788 by Carl Gotthard Langhans, the founder of the Berlin Brandenburg Gate Mausoleum in Wałbrzych. A 1938 monument designed by Robert Tischler to commemorate the Silesian dead of World War I, as well as 23 early Nazis from Silesia. The structure is a four-sided fortalice measuring by , with walls tall. A metal torch on a tall column once at the center of the courtyard was designed by Ernst Geiger. The site is locally rumored to have been used for Nazi SS occult rituals. Railway tunnel under the Little Wołowiec mountain. Counting 1,601 m (5,253 ft) is the longest railway tunnel in Poland Mountain Borowa (black mountain). The highest mountain in the Wałbrzyskie Mountains, with observation tower. Mountain Chełmiec. The second largest peak in the area. A monumental mountain in the shape of a dome that dominates the city. At the top there is an observation tower, 45 meter cross, and two radio-television masts Old Mine – Center for Science and the Arts (Stara Kopalnia - Centrum Nauki i Sztuki)is the biggest post-industrial tourist attraction in Poland, located in the former bituminous coal mine – Kopalnia Węgla Kamiennego "Julia" ("Thorez"). It covers the area of 4.5 hectares of historic post-industrial