The Karkkila Foundry Museum Senkka is a specialized museum dedicated to the history of foundry industry. Located in the historic Högfors ironworks area, the museum includes several exhibition sites—the Finnish Foundry Museum, the Högfors Blast Furnace, and the Workers’ Museum—which showcase the work of ironworks employees with molten metal, as well as everyday life and domestic routines.

The ironworks, founded in 1820, is surrounded by historic industrial buildings, workers’ housing, and the ironworks manor with its park. Together, they form a unique historical setting. At the heart of this heritage stands Componenta Corporation’s modern iron foundry, which continues the industrial tradition of Karkkila.

The Finnish Foundry Museum presents the development of the foundry industry, with a focus on changes in foundry technology. Visitors can learn about the materials used in foundries, how casting molds have been made—both by hand and with machines—and how cast iron is processed. The permanent exhibition features tools, machines, and equipment used in foundry work from about twenty foundries across Finland. A rich collection of historical cast iron products from Högfors is also on display, including stoves, ranges, and decorative castings.

Located on the banks of the Karkkila Rapids, the Högfors Blast Furnace tells the story of pig iron production in Karkkila from 1823 to 1915. It was Högfors’ first production facility and served as the foundation for the town’s thriving metal industry. The Finnish Heritage Agency restored the blast furnace between 1996 and 2000.

The Workers’ Museum is an open-air museum area located in the Fagerkulla district. It illustrates workers’ housing and domestic life from the 1850s to the 1960s. The original buildings remain in their historic locations and have been furnished to reflect different decades of workers’ homes. The former communal bakehouse in Fagerkulla, known as Pakkari, now operates as the museum café.