Old State Road Bridge

AuSable Chasm Bridge is a historic steel arch bridge with concrete and stone faced approach spans that carries US 9 over the Ausable River at AuSable between Clinton and Essex Counties, New York. It was built in 1932–1933. The main span is 222 feet (68 m) in length, with two 52-foot (16 m) foot approach spans, for an overall length with approaches and abutments of 526 feet (160 m). It is approximately 40 feet (12 m) wide, with a span height of 45 feet (14 m) and overall height of 70 feet (21 m).It was listed on the National Register of Historic Places in 1999.

Ausable Chasm is a sandstone gorge and tourist attraction located near the hamlet of Keeseville, New York, United States. It is directly due west of Port Kent. The Ausable River runs through it and then empties into Lake Champlain. The gorge is about two miles (3.2 km) long and is a tourist attraction in the Adirondacks region of Upstate New York. It is fed by the Rainbow Falls at its southern extreme.

Tomlinson House is a historic home located at Keeseville in Essex County, New York. It was built in 1846 and is a two-story frame late-Federal style residence. It features a portico with four slender Doric order style columns supporting a plain frieze and pediment.It was listed on the National Register of Historic Places in 1983.

Rembrandt Hall is a historic home located at Keeseville in Essex County, New York. It was built in 1851 and is a 1+1⁄2-story brick Gothic Revival style cottage. It consists of a central 2-story entrance pavilion flanked by identical bay windows. The interior features a noted rounded central staircase. It was designed by architect Isaac G. Perry for Emma Clara Peale Barton, wife of Caleb D. Barton and daughter of artist Rembrandt Peale.It was listed on the National Register of Historic Places in 1983.

Stone Arch Bridge is a historic stone arch bridge over the Ausable River at Keeseville in Clinton County and Essex County, New York. It was built in 1843.It was listed on the National Register of Historic Places in 1999.

The Keeseville Historic District is a historic district listed on the National Register of Historic Places containing 142 historic structures in Keeseville, in Essex and Clinton counties in New York, in the United States. The buildings, built between 1820 and 1936, are concentrated on the streets near the Ausable River, which runs through the center of the village. The district contains well-preserved examples of industrial and commercial buildings, working-class houses, entrepreneurs' residences, and two historic bridges spanning the Ausable River which divides the village and is the border between Essex and Clinton counties. Keeseville's architectural heritage includes regional examples of Classical, Gothic Revival, and Italianate design, many designed and built by noted local craftsmen Seneca and Isaac Perry, along with more modest structures; many of the structures are built of local river sandstone. In its historic setting and in the quality and variety of its historic structures, the Keeseville Historic District typifies the Adirondack water-powered mill community of the period 1820–1890.It was added to the National Register of Historic Places in 1983.

The Swing Bridge in Keeseville, New York over the Ausable River is not a swing bridge. It is a pedestrian suspension bridge that happens to swing, disconcertingly. It was designed and manufactured by the Berlin Iron Bridge Company in 1888 and it crosses from Clinton County, New York to Essex County, New York.It was listed on the National Register of Historic Places in 1999.

Keeseville is a hamlet (and census-designated place) in Clinton and Essex counties, New York, United States. The population was 1,815 at the 2010 census. The hamlet was named after the Keese family, early settlers from Vermont. It developed along the Ausable River, which provided water power for mills and industrial development. Keeseville is in the towns of Au Sable and Chesterfield and is south of the city of Plattsburgh. It is located inside what are now the boundaries of Adirondack Park, which was authorized in the 20th century. On January 23, 2013, the town's selectboard voted to dissolve the village. As of 2016, the U.S. Census Bureau still had Keeseville listed as a village.

Double-Span Metal Pratt Truss Bridge is a historic Pratt truss bridge over the Ausable River at Keeseville in Clinton County and Essex County, New York. It was built in 1877 by the Murray Dougal & Company of Milton, Pennsylvania. It is 214 feet in length and 16 feet wide. It consists of two 107 foot spans supported by a pier at mid-stream. It is the oldest extant example of a metal Pratt truss bridge in New York State.The bridge carries Liberty Street over the Ausable River between Ausable Street and River River. It was listed on the National Register of Historic Places in 1999. In 2008 it was closed, and was in anticipation of repairs.

Carpenter's Flats Bridge is a historic Warren Steel Truss bridge over the Ausable River at AuSable and Peru in Clinton County, New York. It was built by the American Bridge Company in 1941. The bridge is 255 feet (78 m) in length, 37 feet (11 m) wide, and 38 feet (12 m) in height.It was listed on the National Register of Historic Places in 1999 for representing the distinctive American bridge designs of the late 19th and early 20th centuries and reflecting the development of American land-based transportation systems in an era of settlement.

Delaware and Hudson Railroad Bridge is a pair of historic Warren Steel Truss bridges over the Ausable River at AuSable and Peru in Clinton County, New York. Also known as the Delaware and Hudson Ausable River Bridge, they were built by the American Bridge Company for the Delaware and Hudson Railway in 1913. The North Bridge is 156 feet in length and the South Bridge 173 feet. They are both 16 feet wide and 25 feet in height.It was listed on the National Register of Historic Places in 1999.

The Ausable River (), also known as AuSable River and originally written as "Au Sable", runs in the U.S. state of New York, from the Adirondack Mountains and past the village of Lake Placid and Au Sable Forks to empty into Lake Champlain (at 44°33′40″N 73°25′25″W). It has an East and West branch that join at Au Sable Forks. The river forms a partial boundary between Clinton County and Essex County. The Ausable River is known for its gorge, Ausable Chasm, located a few miles east of Keeseville. The Ausable River is 94 miles (150 km) long and drains a watershed of 516 square miles (1,340 km2).It was originally named "Au Sable" (French for "sandy") by Samuel de Champlain when he first explored the region in 1609 because of its extensive sandy delta.