The golden treasure is said to be hidden in the castle in Budyně nad Ohří as a result of work in an alchemist's workshop. The workshop was recently restored and is a major attraction. The 13th-century castle is surrounded by a moat and the marshy banks of the Ohře River.

The royal fortress in Gothic style was damaged by an explosion in the powder magazine, and two entire wings had to be demolished and rebuilt in Renaissance style. Over the past two centuries, the castle has undergone further modifications. It houses the Janda Museum with an exhibition of the tools and equipment of the last executioner, as well as a price list for his services. In the alchemists' workshop, you will find crooks, a smelting furnace, and mortars of all sizes. You can also see a dining room with a beautiful fireplace, ornate bay windows, and a stuffed crocodile hanging from the ceiling. From the courtyard, you can see the remains of the outer fortifications with keyholes.