The Cape Ann Museum will offer a series of guided walking tours on Friday and Saturday mornings during the months of June, July and August. Tours begin at 10 a.m. at the museum, 27 Pleasant St., Gloucester, and last about 1 1⁄2 hours — participants should be comfortable being on their feet for that amount of time. Tours are held rain or shine. Cost is $10 for Cape Ann Museum members and $20 for nonmembers. Fee includes museum admission. Space is limited; reservations are required.