On Saturday, December 17, residents and visitors are invited to the Somerville Arts Council’s Illuminations Tour.

Guides will lead trolleys past some of the city’s most spectacular displays of holiday lights, sharing stories about the families that decorate and providing local historic trivia en route.

Tours depart from the City Hall Concourse every 45 minutes beginning at 4:30 p.m. Refreshments, choral music and craft activities will be available inside City Hall.

Trolley Tour tickets are available at the Blue Cloud Gallery, 713 Broadway. Tickets are $10 for adults and $5 for children and seniors.

For more information, visit www.somervilleartscouncil.org.