If you get caught up cruising along the South Side Riverfront Trail, you may not realize that you’re in the heart of steel country — Steel Valley. It has the same Pittsburgh steel roots and shadows the railroad on the Monongahela River. Plus, it’s the start of the Great Allegheny Passage ( but we're getting ahead of ourselves ) . And while this paved trail passes right by Sandcastle and Kennywood, the real fun is to be had is on your bicycle. Oh, and keep an eye out for bald eagles !