Title: Obwalden
Content:  Obwalden, also Obwald ((Kanton) Obwalden, ), is one of the 26 cantons forming the Swiss Confederation. It is composed of seven municipalities and the seat of the government and parliament is in Sarnen. It is traditionally considered a "half-canton", the other half being Nidwalden. Obwalden lies in Central Switzerland and contains the geographical centre of Switzerland. It is bordered by the canton of Lucerne to the north, the canton of Nidwalden and Uri to the east and the canton of Bern to the south. The canton is essentially in the valley of the Sarner Aa south of Lake Lucerne, with an enclave around Engelberg. It is one of the smallest cantons. The largest town is Sarnen, followed by Kerns and Alpnach. Together with Nidwalden, Obwalden was part of the forest canton of Unterwalden, one of the three participants in the foundation of the Old Swiss Confederacy, named in the Pact of Brunnen of 1315 with Uri and Schwyz. The division of Unterwalden into two separate territories, Nidwalden and Obwalden, appears to develop over the course of the 14th and 15th centuries.
Title: Oberwald
Content:  Oberwald is a village in the municipality of Obergoms in Goms District in the canton of Valais in Switzerland. It is situated at an elevation of 1,377 m and had a population of 277 in December 2007. It is located at the end of the Goms, directly before the Furka and Grimsel passes, underneath the Rhône River source at the Rhône Glacier. It is also the startpoint of the Furka Tunnel. Most inhabitants live off tourism or sheep farming. Oberwald was an independent municipality until January 1, 2009, when it merged with Ulrichen and Obergesteln to form the municipality of Obergoms.
Title: Oberdorf, Nidwalden
Content:  Oberdorf is a municipality in the canton of Nidwalden in Switzerland. It consists of the villages and hamlets of Wil, Ennerberg, Waltersberg, Büren nid dem Bach and Niederrickenbach. The Benedictine convent of Maria-Rickenbach is located within the municipality, next to the hamlet of Niederrickenbach. The convent lies at an altitude of 1150 m and is accessible by cable car.
Title: Oberwart
Content:  Oberwart (Felsőőr; Gornja Borta) is a town in Burgenland in southeast Austria on the banks of the Pinka River, and the capital of the district of the same name. Oberwart is the cultural capital of the small ethnic Hungarian minority in Burgenland, living in the Upper Őrség or Wart microregion.
Title: Opladen
Content:   Opladen, now a district of Leverkusen, used to be the capital of the Rhein-Wupper-Kreis (Rhine-Wupper-District) until 1975. Opladen station is located 15 km northeast from Cologne on the railway to Wuppertal. It is also on the Autobahn A3. Population (1905) was 6338, (1975) 42,000. It has several Evangelical and Roman Catholic churches. It used to have dyeing works, manufactures of dynamite, indigo products, publishing companies and a railway plant. Before passing to Prussia, Opladen belonged to the duchy of Berg.
Title: Obluda
Content:  The surname Obluda may be found among the various towns and hamlets of Neidenburg, Ostpreussen Germany from the early 17th until the early 20th century. During this time period, the region experienced many changes of national borders. Typically these changes came from a tug-of war between nations, at various times being a possession of either Russia, Germany, or Poland. Today, the region falls within Polish borders, being known as Olsztyn, Poland.
Title: Oberwald railway station
Content:  Oberwald railway station is a railway station serving the village of Oberwald, in the Canton of Valais, Switzerland. The station is close to the western portal of the Furka Base Tunnel, on the metre gauge Furka Oberalp Bahn (FO), which connects Brig in Valais, via the base tunnel and Andermatt in Uri, with Göschenen, Uri, and Disentis/Mustér, Graubünden. Since January 1, 2003, the FO has been owned and operated by the Matterhorn Gotthard Bahn (MGB), following a merger between the FO and the Brig-Visp-Zermatt railway (BVZ). At ceremony held on 12 August 2010, Oberwald station also became a station on the Furka Steam Railway (DFB), a heritage railway operating in summer over the FO section that was replaced by the Furka Base Tunnel in 1982. The portion of the DFB between Oberwald and Gletsch was formally reopened that day, following the driving of a gold spike at a ceremony on 18 June 2010 to mark the physical reconnection of that portion of the line. Scheduled DFB services commenced on 13 August 2010.
Title: Obernheim
Content:  The municipality (Gemeinde) of Obernheimof is located along the southern edge Zollernalb district of Baden-Württemberg, one of the Federal Republic of Germany's 16 States. It lies along the border with Tuttlingen district and the western edge of the Middle Kuppenalb, between the Upper and Lower Bära rivers, in the High Swabian Jura. Elevation above sea level ranges in the municipality from a high of 988 m Normalnull (NN) to a low of 751 m NN. A portion of the Federally-protected Stromelsberg-Hessenbühl nature reserve is located in Obernheim's municipal area.
Title: Oberwolfach
Content:  The town of Oberwolfach lies between 270 and 948 meters above sea level in the central Schwarzwald (Black Forest) on the river Wolf, a tributary of the Kinzig.
Title: Oberbalm
Content:  Oberbalm, is a municipality in the Bern-Mittelland administrative district in the canton of Bern in Switzerland.

Question: What is the capital of Obwalden?
Answer: Sarnen.
Sarnen OW.