Just 6 miles northwest of downtown Boston, Habitat Education Center and Wildlife Sanctuary is a 90-acre urban oasis that has been devoted to environmental education since 1970. Over 2.5 miles of gentle trails wind through deciduous and evergreen forests, across meadows, around 2 ponds, and along a wetland containing a vernal pool. The visitor center is a brick Georgian-style mansion where monthly art exhibits can be viewed. Outside, there’s a pleasing and calming formal garden. The building and gardens can be reserved on weekends for weddings and other events.