This is the remains of a three-span aqueduct across Limestone Creek, first completed in 1856. You can't see the original wooden trunk anymore; it has been replaced by a concrete channel.
This trail/tow path mostly follows the route of the old, historic Erie Canal. Along this portion you can see where the original canal was enlarged, along with some beautiful stonework …
The majority of the Canal Trail is unpaved but consists of hard-packed fine gravel that was easy to ride on with my 34s. Lots of people walking dogs so be prepared to slow down and share the path.
Both Green Lake and Round Lake are of glacial origin. This area is one of the best spots in town to go for a hike and enjoy the views of the turquoise waters.
Along the trail, you'll come across a bridge where a beautiful view of the creek awaits at the trail's northern tip, showcasing the creek's bend. Great place to stop for a break.