Colonial Williamsburg

http://www.history.org/

Monticello

Thomas Jefferson's home
http://www.monticello.org/

SCORE Virtual Field Trips

California source for virtual field trips
http://score.rims.k12.ca.us/lessons/search/?k=virtual+field+trips

Teaching with Historic Places

-Possible Field Trips
http://www.nps.gov/history/nr/twhp/

Education World virtual Field Trip info

Virtual field trip info http://www.educationworld.com/a_tech/tech/tech071.shtml

MANY VIRTUAL FIELD TRIPS

Kind of Web QUEST LIKE INFO - .  I only checked the Baking Bread one, which was great.

http://www.field-guides.com/trips.htm

Virtual tour of St. Petersburg, Russia

- great info 

http://www.saint-petersburg.com/virtual-tour/

Renaissance Florence, Italy

Virtual field trip for middle grade students - an interactive game on Renaissance Florence, Italy

http://www.activehistory.co.uk/Miscellaneous/free_stuff/renaissance/frameset.htm

Field trips at and by the Smithsoinan Institute

Washington, DC

http://www.smithsonianeducation.org/educators/field_trips/field_trips.html