Finland’s capital city is a vibrant cosmopolitan city that reflects the influences of Russian, Swedish and the native Finnish cultures down the centuries. One of Helsinki's biggest attractions is the Suomenlinna fortress, dating back to the 1700s. Now a UNESCO World Heritage Site, the fort has one of the biggest dry docks in the world. The historic city center of Helsinki is equally old, dating back to the 1600s, and encloses some of the major attractions of the Finnish capital city: City Hall, Helsinki Cathedral, the Market Square, the Old Market Hall and the Presidential Palace. The park around Töölönlahti Bay is an extremely popular destination with locals and tourists alike. The brilliant hues of the Winter Garden, the Sports Museum and the Finnish National Opera and the Olympic Stadium are all in its vicinity. Retaining its old-world charm of the early 19th century while keeping pace with modern developments, Helsinki is also a city that is best explored on a cycle, thanks to its numerous biking trails.