Ride the M/V Culebra to Rainsford Island, nestled between Long and Peddocks islands, on The Friends of the Boston Harbor Islands cruise-expedition on Saturday, June 6. The boat departs from Rowes Wharf Water Transport, 60 Rowes Wharf, at 10 a.m. and returns at 2 p.m., rain or shine. Friends volunteers lead guided tours, or you may explore on your own, but be sure to pack a picnic. There is no food or drink on the boat or on the island. This trip offers rare access to the 11-acre island. There are ruins left from two centuries of institutional use: quarantine hospital, poorhouse. Space is limited. Advance paid registration recommended. Available tickets will be sold from 9 a.m. on a first come, first served basis, cash only. Adults $28, Seniors $25, Children 4-12 $18, Babies under age 3 free. For more information, visit www.fbhi.org, email info@fbhi.org, or call 781-740-4290.