Back. We drove up to Niagara Falls on Tuesday, but in order to make it more interesting we stopped along the way. First because we had never been to any of Pennsylvania's many tourist caves, we went to Penn's Cave, in which you descend about 100 feet under the ground to a cave with a little stream running through it, and tour it by boat.
You look around in wonder at the slow creation of the place. Calcium carbonate leeching through the little cracks and constructing its own monuments. The tour takes an hour, it's 52 F degrees all year (and thus winter home to many bats).
It was about an hour, a perfect way to relax and see something cool for a while, instead of just driving.