In this Virtual Field Trip, we travel back in time with two National Geographic experts to explore Washington, D.C.'s geography. Geographer Alex Tait guides us through the streets showing the evolution of our nation's capital from 18th century boundary stones to the modern-day Metrorail system. Explorer Carter Clinton imagines what it was like for a slave to escape to freedom in the 1800's along the Underground Railroad and shows us how DNA samples can examine who those people were.
