This is a large park. It starts with a walk up hill past ruins. The walk to the top to see Filopappos Monument is not worth the walk. Look for Socrates Prison-cave a historic sight. There is small church near the top. You can view the Old National Observatory, not open to the public. BEST thing is the view of the Acropolis from the Pnyx ruin site. The BEST view of Athens and the Acropolis you will get.