The term "underground" in underground railroad means secret. It also was not a road. It was more like a trail. So I guess if you were to say it literally, you would say "secret trail."
Although a few parts of the network involved tunnels or underground hiding places, most of the "underground railroad" consisted of houses and farms of anti-slavery Southerners. They used these...
Yes and no. Parts of it were underground tunnels. They didn't go far though and there were no railroads. It is called the "underground railroad" because it was to be kept a secret or underground. I...