The Florence Griswold Museum in Old Lyme is teaming up with Custom House Maritime Museum in New London and the Connecticut River Museum in Essex to highlight the state’s maritime heritage through exhibitions of art and artifacts, special events and performances, and excursions on the river and Long Island Sound. A 3-in-1 ticket for $16 provides a discount for each location. For more information or to purchase tickets, visit FloGris.org/Sea. Tickets also can be purchased at each location and are good through Sept. 20.