The Geophysical Laboratory is located at 5251 Broad Branch Road, NW, Washington DC 20015.

• Directions from the Beltway to the Geophysical Laboratory

From the Beltway (I-495), merge onto MD-185/Connecticut Ave. via Exit 33, to Connecticut Avenue southbound (toward Chevy Chase). Drive 2.7 miles to the Chevy Chase Circle. Continue around the circle southward on Connecticut for 0.5 miles to Military Road (fourth stoplight). At Military Road, turn left, heading east for 0.5 miles to 32nd St. (third stoplight). Turn right (south) on 32nd St. for one block to the Carnegie Institution of Washington.

• Directions from the Downtown DC to the Geophysical Laboratory

From K St., head northwest on Connecticut Ave., aproximately 5 miles. Turn right on 36th St., just before reaching Nebraska Ave. At the bottom of the hill, turn right onto Nevada Ave. Nevada Ave. becomes Broad Branch Road at the intersection of Nevada Ave., Jocelyn St., 32nd St., and Linnean Ave. Turn left onto 32nd St. at this 5-way-stop intersection. Drive a few feet and turn right into the campus' main driveway.

• Directions from Washington Area Airports to the Geophysical Laboratory

All three Washington area airports are reasonable choices for travel to the Geophysical Laboratory by taxi or SuperShuttle. Ronald Reagan Washington National Airport (DCA) is approximately 9 miles and 30 minutes from GL; Dulles International Airport (IAD) is approximately 25 miles and 40 minutes; and Baltimore-Washington International Thurgood Marshal Airport (BWI) is approximately 36 miles and 50 minutes away. Travel times are heavily dependent on traffic conditions. DCA is the only airport directly serviced by Metro trains (Yellow and Blue Lines).

The Metrobus 5A runs between Dulles Airport and L'Enfant Plaza, D.C. and costs $3.10. In Virginia, the Dulles Connector runs between the airport and Dulles Town Center for $0.50. Washington Flyer express bus travels from West Falls Church Metro station to Dulles for $9. For more information on DCA, please visit http://www.mwaa.com/reagan. For Dulles Airport, go to www.mwaa.com/dulles.

BWI can be accessed by train: Amtrak to New Carrollton Metro station for $12, and MARC to Union Station Metro station for $6. One can take the BWI Express Bus B30 to Greenbelt metro station for $3, Or take a taxi to downtown Washington for $65. For more details on BWI Airport and transportation services, please see www.bwiairport.com.

• Directions to the Geophysical Laboratory via Public Transportation

The Geophysical Laboratory is approximately 1.5 miles from three Metro stations on the Red Line: Van Ness-UDC (at the intersection of Connecticut Ave. and Van Ness), Tenleytown-AU (at intersection of Wisconsin Ave. and Albemarle), and Friendship Heights (at intersection of Wisconsin Ave. and Western Ave.). Taxis are usually available on Connecticut Ave.

Buses are accessible from any of these Metro stations. From the Van Ness-UDC Metro, exit toward the "northbound buses" and take any "L" bus from the stop right outside the escalator. Exit the bus at Nebraska Ave. in front of "Marvelous Market." Turn right on Nebraska Ave and walk down the hill until the first stop light. Turn right onto Nevada Ave. and left onto 32nd Street. Turn right at Carnegie's driveway. If arriving at the Friendship Heights Metro, exit at the Military Road/Western Ave. Exit and board the E2 (Fort Totten) bus on Western Ave. Take the bus to the intersection of 30th St. and Military Rd. Walk west on Military to 32nd St., and then south one block to campus.

Alternatively, take the Metro to Tenleytown-AU and exit at the 40th Street (West) exit. Walk straight ahead and then turn left onto Abelmare St. in front of "Whole Foods." Cross the street and proceed to the M4 bus stop near Wilson High School. Exit the bus at Military Road and 32nd St. Walk down the 32nd St. hill to campus.

For more information on bus and Metro trains, please see www.wmata.com.

• By taxi to or from the Geophysical Laboratory

You may call for a taxi that serves your departure area, the following of which are a few examples:

District of Columbia: Diamond Cab : 202-387-6200 or Yellow Cab : 202-544-1212

Montgomery County: Barwood Taxi : 301-984-1900

Fairfax County: Dulles Taxi Sedan: 703-450-0045

Arlington County: Yellow Cab: 703-522-2222