Webthe hidden park that will make you feel like you’ve discovered pittsburgh’s best kept secret. Sahli nature park in beaver county offers a serene escape with picturesque. Webhere are 10 of the best kept secrets in pittsburgh that may or may not be so secret to you: Enjoy unrivaled views of the galaxy above. Webget on the water. Pittsburgh city sits at the intersection of three rivers (allegheny, monongahela, and the ohio) and has a whopping 446 bridges.