New England Aquarium
$25–$50Circle the four-story Giant Ocean Tank, meet playful penguins and sea turtles right on Boston's waterfront.

Photo: Sarahmusumeci, CC BY-SA 4.0, via Wikimedia Commons. Cropped and resized.
Boston Harbor Islands National & State Park is an outdoor activity in Boston, MA, part of the Boston guide. Cost: under $25. Ferries run mid-May–Oct.
Ferries depart 66 Long Wharf, Boston, MA 02110 · Boston, MA
A short ferry from Long Wharf turns downtown Boston into a national and state park of 34 islands and peninsulas. Georges Island centers on Fort Warren, a granite Civil War fortress you can explore corridor by corridor; Spectacle Island offers swimming beaches, a marina cafe, and drumlin-top trails with knockout skyline views. Rangers lead free tours, and both islands have picnic areas. Boston Harbor City Cruises runs the seasonal ferries, book ahead on summer weekends, and pack layers for the crossing.
The closest stops to Boston Harbor Islands National & State Park, ordered by straight-line distance. A few more like it, plus some different kinds of fun so you can build a full day.
Circle the four-story Giant Ocean Tank, meet playful penguins and sea turtles right on Boston's waterfront.
Right next doorSwitch it up: Attractions
A hop-on hop-off trolley loop past Boston's Freedom Trail sites, the North End, and the harborfront.
Right next doorSwitch it up: Tours
A nighttime trolley of the doomed through Boston's darker side, centuries-old burying grounds, ghost tales and true crime.
Right next doorSwitch it up: Tours
America's first public botanical garden, weeping willows, the Make Way for Ducklings statues, and famous Swan Boats.
1.1 mi awayMore like this
Walk 281 acres of trees, shrubs and lilacs in Harvard's arboretum, a free link in Boston's Emerald Necklace.
5.7 mi awayMore like this
Swim, hike the shore and visit a replica of Thoreau's cabin at the pond that inspired Walden.
16 mi awayMore like this