Many of the city's most important buildings and historical sights are situated on the banks of the River Spree. Examples include the 13th-century Nikolaiviertel, Schloss Charlottenburg, Palast der Republik and Schloss Bellevue. Several new government buildings including the Chancellery, where German Chancellors have their office, are boarding the river in a quarter called the Spreebogen. Broad paths along the Spree make it ideal for a peaceful stroll, best of all through parks like the Tiergarten, Treptower Park or Schloss Charlottenburg's Royal Park. A boat trip is also a great way of doing a bit of sightseeing (boats depart regularly from Museum Island or from Schlosspark Charlottenburg). However, the river is at its most attractive in the Spreewald, a beautiful biosphere reserve 50 miles south-east of Berlin. It is here that the river splits into hundreds of canals and streams, surrounded by rain forest. An extremely popular day-trip destination, the Spreewald is also home to Germany's minority Sorbian community, well-known for their colorful costumes and lively festivals.