The beer is flowing and carnival rides running again at this year’s 179th Oktoberfest in Munich. Known as the world's largest beer festival, the event dates to 1810 when Crown Prince Ludwig was married to Princess Therese and the people of Munich were invited to attend the festivities. More than 6 million people are expected to attend this year’s festival, which runs until Oct. 7. -- NOTE: We're going to be asking some viewers of The Big Picture to answer one or two anonymous survey questions before viewing the full post or you can choose to send a tweet or Facebook post instead. A young man displays a beer mug in the Hofbraeuhaus tent after the opening of the famous Bavarian Oktoberfest beer festival in Munich, southern Germany, on Sept. 22. The world's largest beer festival, held from Sept. 22 to Oct. 7 will attract more than six million guests from around the world. People rest on a meadow during the 179th Oktoberfest in Munich Sept. 23. Millions of beer drinkers from around the world will come to the Bavarian capital over the next two weeks for the 179th Oktoberfest. (Michael Dalder/Reuters) A waitress carries beer after the opening of the 179th Oktoberfest in Munich on Sept. 22. People in traditional Bavarian clothes take a break after the Oktoberfest parade in Munich on Sept. 23. Revelers toast after getting the first beer in the traditional one-litre "Masskrug" beer mugs at the opening day of the Munich Oktoberfest at the Theresienwiese in Munich on Sept. 22. People in traditional Bavarian clothes take a break after the Oktoberfest parade in Munich on Sept. 23. Visitors rest on a meadow at the famous Bavarian Oktoberfest beer festival in Munich, southern Germany, on Sept. 23. A traditional one-litre "Masskrug" beer mug is left behind on a beer garden table during heavy rain falls at the opening day of the Munich Oktoberfest at the Theresienwiese in Munich on Sept. 22. Revelers wait for entrance during day one of the Oktoberfest beer festival at the Hofbraeuhaus beer tent on Sept. 22 in Munich, Germany. A reveler uses a mirror to check out a traditional Bavarian hat on the opening day of the Munich Oktoberfest at the Theresienwiese in Munich on Sept. 22. An actor performs during the Oktoberfest parade in Munich on Sept. 23. Millions of