page_title: Seengen
section_title: Heritage sites of national significance
hierarchical_section_title: Seengen / Heritage sites of national significance
context_page_description: Seengen is a municipality in the district of Lenzburg in the canton of Aargau in Switzerland.
context_section_description: It is home to one or more prehistoric pile-dwelling (or stilt house) settlements that are part of the Prehistoric Pile dwellings around the Alps UNESCO World Heritage Site.
  There are four sites that are listed as a Swiss heritage site of national significance.  These sites include two castles, Brestenberg Castle and Hallwyl Castle as well as the castle mill and on the shores of Lake Hallwil, the late-Bronze Age village at Risi.
caption: Brestenberg castle
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