The Mount Lincoln Trail near Belchertown and Amherst Massachusetts is an easy 1.7 mile out-and-back hike up to a radio tower in the middle of the woods on UMass property at the Cadwell Memorial Forest.
The trail climbs up a hill to where UMass' WAMH-FM station broadcasts. Even though it's UMass' property, they do allow day hikers and bikers on their trails.
There's a lookout from the top of the tower, but signs prohibit climbing the steps.
Do not park in front of the service gates, you will likely get towed.