Three festivals this fall offer residents and visitors plenty to see, hear, do, or ponder as the weather turns cooler.

First up is the Copenhagen Beer Celebration. This craft beer festival at City Hall Plaza Sept. 23-24 is taking place in the United States for the first time. Co-produced by Denmark's Mikkeller Brewing and Boston Calling organizer Crash Line Productions, the festival will showcase more than 100 craft beers from all over the world and feature live music from Yo La Tengo, the Barr Brothers, Lucero, and others.

This year, the Copenhagen Beer Celebration takes the place of Boston Calling's usual fall concert.


"You can have a band like Mariachi El Bronx and be discovering brand-new beers as well as being able to continually reimagine what you can do outdoors in the city of Boston," says Mike Snow, cofounder of Crash Line. "That's always been something important to our company."

Snow says the celebration is well suited to Boston due to its many young residents. There's also a flourishing craft beer industry in New England, which speaks to much of the region's heritage.

"You've got a great tradition of beer being a part of life over here," Snow says. "You've got a great tradition of Western European people coming over here to start their lives."

For more information, visit www.copenhagenbeerfest.com.

The second annual HUBweek (Sept. 25-Oct. 1) positions itself at the intersection of art, science, and technology. Founded by Massachusetts Institute of Technology, Massachusetts General Hospital, Harvard University, and The Boston Globe, HUBweek collaborates with more than 100 organizations to host events ranging from tech labs to policy discussions.

The festival's goal, according to marketing and communications head Liz Paquette, is to showcase work from all across the Boston area and inspire creativity among industry leaders and attendees.


"We are definitely not out to be the next big life science conference or the next big arts festival," Paquette says. "We think we're uniquely positioned to bring together these different groups and see what we can create together."

Among HUBweek's many events is the Speak Up! Art Is Action collaborative mural, at the Edward M. Kennedy Institute on Sept. 30. After a week of hearing conversations on innovative artistry, visitors will have a chance to add their own flourishes to the public mural created by Artists for Humanity.

"Inclusive innovation is definitely a big theme for the week," Paquette says. "It's pervasive in programming throughout the week, which is definitely related to the broader conversation that's happening on a national level."

Other notable events include multi-day film festivals, walking art tours, and the "pARTy on the Greenway," which features live performances and dancing on the Rose Kennedy Greenway. For more information, visit www.hubweek.org.

ArtWeek Boston (Sept. 30-Oct. 9), presented by the Highland Street Foundation and produced by Citi Performing Arts Center, works to make the city's arts scene more accessible to the public. More than half of the 180-plus events are free, and the festival has expanded its outreach by hosting events in more than 50 towns and neighborhoods.

"The ArtWeek events offer a behind-the-scenes look or sneak peak at the creative process, or they're very experiential," says Vivian Baguer Holland, associate director of special projects at Citi Performing Arts Center.

Several of the events deal with a particularly timely topic, immigration. One such example is "The Bay State: A Multicultural Landscape, Photographs of New Americans" by artist and writer Mark Chester. ArtWeek will also offer activities as diverse as tango lessons, a TEDx Talk workshop, and a preview of Tony Williams Dance Center's "Urban Nutcracker."


For more information, visit www.artweekboston.org.

Sonia Rao can be reached at sonia.rao@globe.com.