Boston's Beacon Hill has some of the most important sites in US history. Here's your guide to walking the Black Heritage Trail: what the trail is, the stories behind it, and how to visit well.

Gettysburg is often called the most famous small town in America because it was the site of the greatest military clash of the American Civil War.  Union and Confederate forces fought fiercely over three days (July 1-3, 1863), suffering more than 51,000 casualties. 

The battle is famously called the "high-water mark" of the Confederacy.