Every year I hike the Billy Goat Trail along the Potomac River on the Maryland side, usually with a friend. The trail is a moderately difficult 3-mile scramble over rocks, up boulder fields and around tree roots.
This year I did it in the fall, which is late for me, as I usually do it in the summer. But with so many of the leaves blown off the trees by the lateness of the season, I enjoyed better vistas of the river from the trail, which runs through wooded land for the most part.
There are spots where the trail comes out upon sheer precipices overlooking the river. Also long rock crevices on cliff faces you have to traverse.
If you're not somewhat fit the trail won't be an enjoyable experience. But completing the trek does give one a certain measure of satisfaction, given its moderate difficulty.