National Geographic: The Underground Railroad You're a slave in 1850's Maryland, and you have the opportunity to heed Harriet Tubman's call to board the Underground Railroad. She's never lost a passenger, but the decision to leave is only the beginning of the journey. Along the way, you'll have to judge whether that's really a safe house ahead and if Canada should be your final refuge. The site offers a glimpse of the slave experience, providing a timeline, a map, and biographies to flesh out the era. The evocative graphics and text make for compelling interactive history. (in Civil War and Slavery)
