According to a nearby information board:

This gentle slope was part of a King’s Highway constructed in 1741 and known locally as the Goshen Road. When the Ellisons’ stone house was built here in 1754, it faced this heavily traveled highway. Over this road various grains were brought to the Ellison gristmill Products from the mill were carted to the Ellison dock at New Windsor, where they were loaded onto a family-owned sloop destined for the Ellison wharf in New York City. From there they were shipped overseas or to other colonies. When parts of the highway were formed into the New Windsor and Blooming Grove Turnpike in 1801, an L-shaped section in front of John Ellison’s house was by-passed. Today, this fragment of a once busy highway leads towards the ruins of the Ellison’s gristmill and to the stone-arched bridge that carried the road across the Silver Stream and on toward Goshen.

Taken with a Panasonic Lumix GF1 and G vario 14-42 asph f3.5-5.6.