Historical? Building

This cool old building sits on PA-66 across the Kiskiminetas River from Apollo, PA, and is backed up right against a steep hillside. I pass it every time I drive to our church's state camp ground and offices in Emlenton.

I'd say it's abandoned, but last summer I saw someone sitting on the second floor balcony. Was it a hotel? A boarding house?

If anyone has any information about this fascinating building, please share.