The neoclassical church of Askainen was built by the owner of Louhisaari Manor, Governor-general Herman Claes'son Fleming in 1653 as the chapel church of Louhisaari Manor. It’s one of the rare stone churches in Finland built after the Reformation in the 17th century. The belfry was erected in 1772–1779. There is a funeral chapel of the Mannerheim family in the cemetery.
The Askainen noblemen's church is part of the oldest tourist route in Finland, the Seven Churches Tour, together with Raisio, Masku, Nousiainen, Lemu, Merimasku and Naantali. Finnish National Board of Antiquities has named the church and near Louhisaari manor as National Built Heritage.
The Externsteine (Extern stones) is a distinctive sandstone rock formation located in the Teutoburg Forest, near the town of Horn-Bad Meinberg. The formation is a tor consisting of several tall, narrow columns of rock which rise abruptly from the surrounding wooded hills. Archaeological excavations have yielded some Upper Paleolithic stone tools dating to about 10,700 BC from 9,600 BC.
In a popular tradition going back to an idea proposed to Hermann Hamelmann in 1564, the Externsteine are identified as a sacred site of the pagan Saxons, and the location of the Irminsul (sacral pillar-like object in German paganism) idol reportedly destroyed by Charlemagne; there is however no archaeological evidence that would confirm the site's use during the relevant period.
The stones were used as the site of a hermitage in the Middle Ages, and by at least the high medieval period were the site of a Christian chapel. The Externsteine relief is a medieval depiction of the Descent from the Cross. It remains controversial whether the site was already used for Christian worship in the 8th to early 10th centuries.
The Externsteine gained prominence when Völkisch and nationalistic scholars took an interest in the late 19th and early 20th centuries. This interest peaked under the Nazi regime, when the Externsteine became a focus of nazi propaganda. Today, they remain a popular tourist destination and also continue to attract Neo-Pagans and Neo-Nazis.