Hallstatt is a quaint town in the lake region, also known as the Salzkammergut, of Austria.  It is about 20 miles east of Salzburg. Some describe it as one of the most picturesque towns in all of Europe, and it has been declared a World Heritage Site by UNESCO.  The town is built around a lake and surrounded by steep mountains, making the buildings a bit cramped.
One of the more bizarre attractions in Hallstatt is its Charnel House.  Because Hallstatt only has one very small cemetery, the bones there are periodically exhumed and placed in the Charnel House.  Also nearby are the Dachstein ice caves in the town of Obertraun.  There are three main caves: Koppenbrüllerhöhle, Rieseneishöhle, and Mammuthöhle (Koppenbrüller Cave, Ice Cave, and Mammoth Cave).