49 Bay State Rd. Cambridge, MA 02138 USA

From the Airport:
By Taxi: Taking a cab from the airport will cost about $50.00. You should tell the driver to take you to Concord Ave. via Harvard Square in Cambridge. Once on Concord Ave., driving away from Harvard Sq., you will cross over Huron St. and soon after, you will see a school playground on your left and Fern St. on your right. (If you get to a rotary, you have gone too far.) Turn right onto Fern St. Then left onto Bay State Rd. We are just past the park on the right. The ride can take anywhere from 20 to 50 minutes depending on traffic.

By Public Transportation: Public Transportation from the airport to the AAVSO can be a little challenging, however it is much cheaper than taking a cab. At the airport, you will need to take one of the complimentary shuttle buses from your terminal to the airport subway ("T") station (very short ride). Once there, you want to take the Inbound Blue line. The subway fare is currently $1.25. Ride the Blue line inbound and get off at the "Government Center" stop. Here you will transfer to the Green line. Take any Green line train headed inbound toward "Park Street" (usually pronounced "pahk"), you are only going one stop. Get off the Green line at "Park Street". Here you transfer to the Red line. Follow the signs to the OUTBOUND Red line train. The final destination of the train will be "Alewife" and the train will pass through Harvard Square. Take this train and get off at the Harvard Square T stop. Once at Harvard Sq. follow signs to the bus lines. You will need to take either the 74/75 bus or the 78 bus to get to the AAVSO. Bus fare is currently $0.90 Take either bus and ask to be let off at the National Guard Armory stop, which is approximately 7 minutes from the Harvard Square station. You will be let off at the corner of Birch Street and Concord Avenue. Walk down Birch Street, then left onto Bay State Rd. We are on the right. This whole process usually takes about an hour.

From Elsewhere
By Car: To get to AAVSO HQ by car, take Route 128 (also called Route 95) to Route 2 East (Arlington, Belmont, Boston). Do not take Route 2A.

Drive on Route 2 East until you begin to see stores and restaurants (approximately 5 miles). Keep to the right once the highway ends and continue over the bridge. On the right, you will see a large glass/metal structure, which is the "Alewife" subway station. You are now on the Alewife Brook Parkway. Continue on this road until you reach the first rotary. There should be shopping centers on both sides of the road.

Imagine the rotary as a clock. You will enter the rotary at "6 o'clock", and leave the rotary at "11 o'clock". You will then, almost immediately, see another rotary. You will enter this rotary at "5 o'clock" and leave it at "12 o'clock". You will now be on Bay State Rd. Immediately bear right to stay on Bay State Rd. We are about 100 yds down on the left.

By Subway (The "T"):
The closest subway station to the AAVSO is the Alewife station, at the northern end of the Red Line. From Alewife station, walk out to the Alewife Brook Parkway, and walk on the left hand side of the Parkway, where there is a small walkway (large apartment buildings should be on your left side). Cross over the bridge, and continue on the Parkway, passing a shopping center on your left. Follow the road as it curves to the left, passing a gas station and a Dunkin Donuts store. Cross the street with the rotary at your right, turn left so the furniture store is on your right. Stay to the right, this is Bay State Rd. We are down on the left.

By Bus:
Two buses, route 74/75 and 78, stop near the AAVSO. Take either bus from the Harvard Square subway stop (on the Red Line). Ask to be let off at the National Guard Armory stop, which is approximately 7 minutes from the Harvard Square station. You will be let off at the corner of Birch Street and Concord Avenue. Walk all the way down Birch Street then left onto Bay State Rd. We are on the right.