So you are visiting Boston with family or a small group of people and want to experience a National Park or Marine Sanctuary easily accessible from downtown Boston: Boston Harbor Islands National Park or the Stellwagen Bank National Marine Sanctuary
Visit the Boston Harbor Islands on a private cruise with 4-6 of your family/friends. Offered weekdays from 6pm until sunset. Costs is $100 adults and $50 children 12 and under per person with minimum of 3 people cruising. Get up close to Graves Light Station.
Visit the Stellwagen Bank National Marine Sanctuary on a private cruise with 4-6 of your friends. Offered only on weekends from 6am - 12 noon OR 1pm - 7pm. Costs is $150 per person with minimum of 4 people cruising. Depending upon season see Finback whales, Right whales (one of the most endangered whales on the planet and they gather in Cape Cod bay in the early Spring), Minke whales, Sei whales, Humpback whales, Atlantic white-sided dolphins, basking sharks, leatherback turtles, loggerhead turtles, and ocean sunfish!