Arnold Arboretum - Jamaica Plain - orange line
Blue Hills Reservation - Milton - commuter rail or red line + bus
Cutler Park Reservation - Needham - commuter rail
Franklin Park - Jamaica Plain - orange line
Fresh Pond Reservation - Cambridge - red line
Hammond Pond Reservation / Webster Conservation Area - Chestnut Hill - walk!
Middlesex Fells - Stoneham - orange line + bus or walk
Mount Auburn Cemetery - Cambridge - red line + bus