Ånhammar and its surroundings are very beautiful. Ånhammar dates back to the Iron Age, there are several burial grounds nearby, including two on Näset, the peninsula south of Ånhammar. In written documents, Ånhammar is mentioned for the first time in 1366 when a johanne in vnambre is mentioned. Ånhammar received seat privileges in the 1630s, through the then owner Henrik Stöör.
The main building is a one-story wooden house, built in 1638 in Carolingian style. To its current appearance with its hipped roof, most of the exterior dates from the beginning of the 18th century. The original appearance of the building was red, lying timber. In 1864, panels were put up on the front of the main building and in 1912 also on the wings.
The access road to the manger passes the older cattle farm with stables and outbuildings, part of which is traditionally separated from the manger by a fence. New economic buildings were erected at the beginning of the 19th century northeast of the manor. At the entrance to the manor, you can see the magazine from 1837. There, the estate has a farm museum built by Anders von Stockenström together with his wife Elisabeth since the 1950s. Here there are historical collections with around 2,000 items, including driving equipment, agricultural implements, tools, machines and much more.
To the west of the barn buildings stands a wooden fatabur from the 17th century and a gate, moved there from Glömnäs. The Sörmlandsleden passes past Ånhammar (between stage goals 18 and 19). In 1973, the first stage of the Sörmlandsleden was inaugurated here at Ånhammar.
In the slope down towards lake Dunkern there is also a rune stone, with the sign Sö 13.