Pretty Lighthouse on the Ottawa River. Nice views across the river with islands etc. Sandy beach nearby for a quick dip. Be mindful of private property though.
Old train bridge recently converted into a trail for pedestrians, cyclists, and ATVs. See nice views of the Madawaska River running through Arnprior and the old train trestle looking north.
Old CN rail track. Nice and smooth finely crushed gravel throughout. Fast rolling. In Renfrew, it connects to the K&P Trail to Kingston. In Arnprior, it connects to the Algonquin Trail back Renfrew or toward Ottawa.