Apple River (Wisconsin)

Arcola Mills is a historic house in the unincorporated community of Arcola, Minnesota, United States. Built in 1847, it is considered the third-oldest and largest all-wood-frame house still standing in Minnesota. It was the home of brothers Martin and John Mower, who established one of the first sawmills on the St. Croix River and the community around it. The house and the remnants of the nearby mill were listed on the National Register of Historic Places in 1980 as the John and Martin Mower House and Arcola Mill Site for having local significance in the themes of architecture, exploration/settlement, and industry. The property was nominated as an "excellent example" of Greek Revival architecture and for its association with the region's early settlement and lumber industry. The property now operates as a non-profit event and education center.

Croixsyde is a historic house in May Township, Minnesota, United States, near the city of Stillwater. It was built from 1922 to 1927 as one of the first summer homes on the St. Croix River. It was listed on the National Register of Historic Places as the Benjamin B. Sheffield House in 1980 for its local significance in the themes of architecture and entertainment/recreation. It was nominated for being an early example of the area's summer homes and for its fine rustic architecture.

The Soo Line High Bridge, also known as the Arcola High Bridge, is a steel deck arch bridge over the St. Croix River between Stillwater, Minnesota and Somerset, Wisconsin, United States. It was designed by structural engineer C.A.P. Turner and built by the American Bridge Company from 1910 to 1911. The bridge was listed on the National Register of Historic Places in 1977 for its national significance in the themes of engineering and transportation. It was nominated for its exceptional dimensions, beauty, innovative engineering techniques, and importance to transportation between Minnesota and Wisconsin.

Arcola is an unincorporated community in May Township, Washington County, Minnesota, United States. Arcola is located in the southeast part of May Township along State Highway 95 (MN 95). The northeast part of Stillwater Township is also in the immediate area. Nearby places include Stillwater and Marine on St. Croix. Arcola was first settled circa 1847. The John and Martin Mower House and Arcola Mill Site, around which the community was founded, is listed on the National Register of Historic Places.

The O'Brien Observatory (OBO) is an astronomical observatory in the city of Marine on St. Croix, Minnesota, United States, about 35 kilometers (22 mi) northeast of Minneapolis. The observatory is owned and operated by the University of Minnesota and opened in 1968. It has one telescope, a 0.76-meter (30 in) Cassegrain reflector capable of observing at both optical and infrared wavelengths. It is used for primarily for instruction and instrument testing, and occasionally for research purposes.

Somerset is a town in St. Croix County, Wisconsin, United States. The population was 4,036 at the 2010 census. The Village of Somerset is adjacent to the town.

Somerset is a village in St. Croix County, Wisconsin, along the Apple River. The population was 2,635 at the 2010 census. The village is located within the Town of Somerset.

The Marine Mill, established in 1839, was the first commercial sawmill in what became the U.S. state of Minnesota. Now in ruins, it is currently a historic site managed by the city of Marine on St. Croix in partnership with the Minnesota Historical Society. It was listed on the National Register of Historic Places as the Marine Mill Site in 1970 for having state-level significance in the themes of exploration/settlement, industry, and transportation. It was nominated for being the birthplace of the region's seminal industry—lumbering—and a major landing on its crucial transportation route, the St. Croix River. The site is also a contributing property to the Marine on St. Croix Historic District.

Square Lake is a lake in Washington County, in the U.S. state of Minnesota.Square Lake was so named on account of its boxy outline.

The St. Croix Boom Company House and Barn is a historic residence in Stillwater Township, Minnesota, United States, built circa 1885. It was listed on the National Register of Historic Places in 1980 for its local significance in the theme of industry. It was nominated as the only known standing building associated with the St. Croix Boom Company, which operated a log boom critical to Minnesota's logging industry from 1856 to 1914.

The St. Croix Boom Site is a historic and scenic wayside on the St. Croix River in Stillwater Township, Minnesota, United States. It commemorates the location of a critical log boom where, from 1856 to 1914, timber from upriver was sorted and stored before being dispatched to sawmills downstream. The site was developed as a roadside park along Minnesota State Highway 95 in the 1930s. In 1966 it was designated a National Historic Landmark for its national significance in the theme of industry. It was nominated for being the earliest, most important, and longest serving of the log storage and handling operations that supported Minnesota's major logging industry. Virtually no traces remain of the site's original buildings and structures.

William O'Brien State Park is a 1,520-acre (6.2 km2) state park of Minnesota, USA, along the St. Croix River. Its hiking trails traverse rolling glacial moraine, riparian zones, restored oak savanna, wooded areas and bogs. It is a popular place for birdwatching, picnics, camping, cross-country skiing, canoeing, fishing, and other typical outdoor recreational activities. The park is located approximately two miles north of the town of Marine on St. Croix, Minnesota.