Been to Hallstatt many times its a wonderful place , stay just outside at Obertraun its where a cave dive called " Die Kessel " starts , now that is a very serious undertaking
There is also the very unique and quite bizarre place called " Die Beinhaus"
https://www.hallstatt.net/ueber-hallstatt/sehenswertes/katholische-pfarrkirche-hallstatt/beinhaus-hallstatt/