Saturday, the iconic William Penn Memorial Fire Tower area on top of Mt. Penn was hosting a Chicken BBQ and the tower was open to the public to climb the stairs to the observation deck.
The website states that it is open every 3rd Saturday or every month. I'm not sure that this info is current, but it offers fabulous 360 degree views and up to 30 miles. If you find it open, it's worthy of a visit for sure.
Mt. Penn is loaded with trails. Many pass by the fire tower area. The Elverson & Berks Hiking clubs hike this area too. Here's a map of some of the trails.