View looking west showing small farms and cottages. The Knapsack Bridge can be seen in the background. Designed by John Whitton, it has seven sandstone arches five and a half metres wide and thirty-eight metres high. Up until 1913 when the Glenbrook deviation was built, the Knapsack Bridge formed part of the Lapstone Zig-Zag. It was reopened to road traffic as part of the Great Western Highway in 1926 and finally closed in the 1990s.