Austria facts Selected as the most interesting among Europe related questions in Europe quiz Which two European capitals are the closest to each other?Vienna and Bratislava. Bratislava is only 60 kilometers (37.3 mi) from the Austrian capital Vienna. Before the Second World War, there was a regular fast tram service between the two.Created by: globalquiz.orgSlovakia facts » Where is the headquarters of OPEC?In Vienna. OPEC was created in 1960 with headquarters in Geneva, Switzerland. It moved to Vienna, Austria in 1965.Created by: globalquiz.orgoil facts » What did Niki Lauda do after the end of a career in F-1?He ran his own airline. Lauda Air Luftfahrt GmbH, branded as Lauda Air, was an Austrian charter airline based in Vienna, which was founded by Niki Lauda. In 1999 he sold his shares and the company merged with Austrian Airlines. At the end of 2003 he launched a second, competitive airline Niki.Created by: Krzysztof Moskalcar racing facts » What is Serfaus known for?It is the smallest city with an active metro. Serfaus is a municipality in the district of Landeck in the Austrian state of Tyrol. Serfaus is also known for its small hovertrain subway system, the Dorfbahn Serfaus. With four stations and a length of 1280 m (the second-shortest underground train line in the world) it allows for a complete ban of cars within the town, while at the same time maintaining the village's attractiveness to tourists, particularly skiers. Created by: Tschukametro facts » What is the second largest city in Austria, after Vienna?Graz. The four largest cities in Austria are Vienna (1.8 million), Graz (269,000), Linz (193,000) and Salzburg (146,000).Created by: globalquiz.orgVienna facts » What jubilee did the Wiener Wurstelprater amusement park celebrate in 2016?250 years. This institution dates back to the time of the Austrian Empire, when Emperor Joseph II made the Prater open to public in 1766. Soon the first snack bars, stalls and bowling alleys opened up on the grounds and the Wurstelprater was born. The best-known attraction is the Wiener Riesenrad, a 64.75 metre tall Ferris wheel.Created by: NinjaiEntertainment facts » How long is the longest single residential building in the world? 1100 meters. Karl-Marx-Hof was built between 1927 and 1930 by city planner Karl Ehn, a follower of Otto Wagner. It held 1,382 apartments. Only 18.5% of the 156,000 m²-large area was built up, with the rest of the area developed into play areas and gardens. At over a kilometre in length (1,100 metres)) and spanning four Straßenbahn (tram) stops, Karl-Marx-Hof is the longest single residential building in the world. Created by: Tschukaarchitecture facts » Play Europe quiz and see all the questions.