Complex sentence: Set apart from most of the other High Peaks, the summit offers a 360-degree view of the Adirondacks and clear-day glimpses of Vermont and even Canada, where the skyscrapers of Montreal, away, can be seen on a very clear day.
Split into simpler sentences: Set apart from most of the other High Peaks, the summit offers a 360-degree view featuring the Adirondacks and perhaps on a clear day glimpses of Vermont and even Canada. The skyscrapers of Montreal, away, can be seen on a very clear day.