One of the largest multicultural environmental music festivals in the region, Boston GreenFest will take place for its 11th year from August 3 to 5, at Boston City Hall Plaza and Faneuil Hall. This free event offers a huge assortment of exhibits, films and live performances and presentations about sustainable living. Eco themes include water, energy, green cities, transportation, health, nutrition and eco-fashion.

Beyond exhibits and educational opportunities, great food, wine and beer will be available, and attendees will enjoy eco vendors, culture and amazing entertainment, including evening concerts.

Cost: Free. Location: Boston City Hall Plaza, 1 City Hall Square, Boston. For more info, visit BostonGreenFest.org.