Virtual Geology Trips: http://college.hmco.com/geology/resources/geologylink/fieldtrips.html
Geology: http://college.hmco.com/geology/resources/geologylink/index.html
Virtual Geology Trips: http://college.hmco.com/geology/resources/geologylink/fieldtrips/natrips/us_east.html#se
Museum of Minnesota - Think Fountain: http://www.thinkingfountain.org/