Oktoberfest beer

Photo: Johannes Simon/Getty Images

Revelers reach for one of the first mugs of beer served inside the Hofbraeu tent on Sept. 21, the first day of the much beloved Oktoberfest in Munich, Germany.

Held at the Theresienwiese fairgrounds over 16 days, the world's largest beer festival draws millions of visitors who collectively consume nearly 2 millions gallons of beer — that's enough to fill three Olympic-sized swimming pools!

Despite the festival's epic alcohol content, Oktoberfest is generally regarded as a family friendly event that boasts amusement park rides, parades, live performances and a wide variety of traditional Bavarian foods.

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Oktoberfest parade

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A member of a costumed group performs for the crowds in the opening parade of Munich's Oktoberfest.

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Oktoberfest rides

Photo: Alexander Hassenstein/Getty Images

Young people wearing drindls and lederhosen enjoy a fairground ride.

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Oktoberfest tent

Photo: Johannes Simon/Getty Images

People crowd the Hacker-Pschorr tent to drink, eat and mingle with fellow Oktoberfest revelers.

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Women on an Oktoberfest ride

Photo: Alexander Hassenstein/Getty Images

A group of young women wearing drindls enjoy an amusement park ride.

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Oktoberfest beer spilling

Photo: Alexander Hassenstein/Getty Images

Revelers in the Hofbraeu tent grasp at one of the first mugs of beer served on the opening day of Oktoberfest.

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Oktoberfest from above

Photo: Joerg Koch/Getty Images

In this aerial photo of the Theresienwiese grounds, the Oktoberfest tents and amusement park rides glow against the dark sky.

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Oktoberfest ride

Photo: Johannes Simon/Getty Images

People ride an illuminated swing carousel on the first night of Oktoberfest.

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Catie Leary is a photo editor at Mother Nature Network. Follow her on Twitter and Google+.