Healey Falls is a big one! Admittedly, it has been partially compromised by the construction of an equally big dam right across the top of the falls. It is still, however, a great place to visit. The Trent River falls probably 10-20 meters, not in one large plunge, but in a rugged series of wide steps. The limestone is thinly bedded yielding hundreds of little steps. If the river flow isn't too great, you can easily walk right out onto the bedrock below the dam. If the flow is high though, watch out! I've seen the river blasting across the bedrock with fatal force, carrying test sticks dropped from the dam out to the bay in seconds!